Sort

Self-host apps that fit your server, storage, and setup comfort

License: Apache-2.0×clear all

full app records

Supabase

Backend stack with Postgres, Auth, Storage, Realtime APIs, Edge Functions, and Studio.

slug: supabase
categories: developer tools
publisher: Supabase (company)
website: https://supabase.com
source code: https://github.com/supabase/supabase
install docs: https://supabase.com/docs/guides/self-hosting/docker
docs: https://supabase.com/docs
docker: https://hub.docker.com/u/supabase
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web, api
database: postgres
ram: under 1gb
storage: high
maintenance: active
latest release: v1.26.07
latest release date: Jul 9, 2026
last commit: Jul 10, 2026
primary language: TypeScript
github topics: firebase, supabase, realtime, postgrest, postgres, postgresql, websockets, deno, embeddings, vectors, alternative, auth, database, example, nextjs, oauth2, pgvector, postgis, ai

Home Assistant

Home automation hub for controlling devices, automations, dashboards, and local smart home integrations.

slug: home-assistant
categories: home automation & iot
publisher: Open Home Foundation (foundation)
website: https://www.home-assistant.io
source code: https://github.com/home-assistant/core
install docs: https://www.home-assistant.io/installation/linux
docs: https://www.home-assistant.io/docs/
docker: https://github.com/home-assistant/core/pkgs/container/home-assistant
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web, mobile
database: no
ram: under 1gb
storage: high
maintenance: active
latest release: 2026.7.1
latest release date: Jul 3, 2026
last commit: Jul 10, 2026
primary language: Python
github topics: python, home-automation, iot, internet-of-things, mqtt, raspberry-pi, asyncio, hacktoberfest

LocalSend

Local network file transfer app for sending files between nearby desktop and mobile devices.

slug: localsend
categories: file sharing & sync
publisher: LocalSend (community)
website: https://localsend.org
source code: https://github.com/localsend/localsend
install docs: https://localsend.org/download
docs: https://localsend.org/
docker: https://github.com/localsend/localsend/blob/HEAD/server/Dockerfile
license: Apache-2.0
license type: permissive
source model: open source
surfaces: desktop, mobile, web
database: no
ram: under 1gb
storage: medium
maintenance: active
latest release: v1.17.0
latest release date: Feb 20, 2025
last commit: Jul 10, 2026
primary language: Dart
github topics: flutter, file-sharing, dart, flutter-apps

Caddy

Web server and reverse proxy with automatic HTTPS and Caddyfile configuration.

slug: caddy
categories: networking & dns, system admin & hosting
publisher: Caddy (community)
website: https://caddyserver.com
source code: https://github.com/caddyserver/caddy
install docs: https://caddyserver.com/docs/running#docker-compose
docs: https://caddyserver.com/docs/
docker: https://hub.docker.com/_/caddy
license: Apache-2.0
license type: permissive
source model: open source
surfaces: cli
database: no
ram: under 1gb
storage: high
maintenance: active
latest release: v2.11.4
latest release date: Jun 3, 2026
last commit: Jul 10, 2026
primary language: Go
github topics: go, web-server, caddyfile, http, http-server, reverse-proxy, https, tls, automatic-https, privacy, security, acme, caddy, golang, http3

Superset

Business intelligence web app for exploring datasets and building dashboards.

slug: superset
categories: dashboards
publisher: Apache Software Foundation (foundation)
website: https://superset.apache.org
source code: https://github.com/apache/superset
install docs: https://superset.apache.org/docs/installation/docker-compose/
docs: https://superset.apache.org/docs/intro
docker: https://hub.docker.com/r/apache/superset
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: postgresql
ram: under 1gb
storage: high
maintenance: active
latest release: 6.1.0
latest release date: May 13, 2026
last commit: Jul 10, 2026
primary language: TypeScript
github topics: superset, apache, apache-superset, data-visualization, data-viz, analytics, business-intelligence, data-science, data-engineering, asf, bi, business-analytics, data-analytics, data-analysis, python, react, sql-editor, flask

Unsloth Studio

Interface for training and fine-tuning local language models with Unsloth tools.

slug: unsloth-studio
categories: ai & ml
publisher: Unsloth AI (company)
website: https://unsloth.ai/docs
source code: https://github.com/unslothai/unsloth
install docs: https://github.com/unslothai/unsloth#readme
docs: https://docs.unsloth.ai/
docker: unknown
license: AGPL-3.0 for studio; Apache-2.0 for core library
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: 4gb+
storage: high
maintenance: active
latest release: v0.1.481-beta
latest release date: Jul 7, 2026
last commit: Jul 10, 2026
primary language: Python
github topics: fine-tuning, llama, llms, mistral, gemma, llama3, unsloth, llm, deepseek, gemma3, text-to-speech, tts, qwen, agent, openai, gpt-oss, reinforcement-learning, self-hosted, ui

Prometheus

Metrics system for scraping targets, storing time series, and evaluating alerts.

slug: prometheus
categories: monitoring & status
publisher: Cloud Native Computing Foundation (foundation)
website: https://prometheus.io
source code: https://github.com/prometheus/prometheus
install docs: https://prometheus.io/docs/prometheus/latest/installation/
docs: https://prometheus.io/docs/introduction/overview/
docker: https://hub.docker.com/r/prom/prometheus
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web, cli
database: no
ram: under 1gb
storage: high
maintenance: active
latest release: v3.13.1
latest release date: Jul 10, 2026
last commit: Jul 10, 2026
primary language: Go
github topics: monitoring, metrics, alerting, graphing, time-series, prometheus, hacktoberfest

Coolify

Deployment app for running services, databases, and projects on your own servers.

slug: coolify
categories: system admin & hosting
publisher: coollabsio (community)
website: https://coolify.io
source code: https://github.com/coollabsio/coolify
install docs: https://github.com/coollabsio/coolify#readme
docs: https://github.com/coollabsio/coolify#readme
docker: https://github.com/coollabsio/coolify/blob/HEAD/docker-compose.yml
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: postgres, redis
ram: under 1gb
storage: high
maintenance: active
latest release: v4.1.2
latest release date: Jun 4, 2026
last commit: Jun 4, 2026
primary language: PHP
github topics: nodejs, mysql, php, docker, self-hosting, redis, svelte, databases, nextjs, coolify, deployment, docker-compose, inertiajs, laravel, mariadb, postgres, self-hosted, server, static-site, svelte5

ClickHouse

Stores and queries analytical data with a column-oriented SQL engine built for high-volume, low-latency workloads.

slug: clickhouse
categories: databases
publisher: ClickHouse
website: https://clickhouse.com
source code: https://github.com/ClickHouse/ClickHouse
install docs: https://clickhouse.com/docs/install
docs: unknown
docker: official
license: Apache-2.0
license type: permissive
source model: open source
surfaces: cli, api
database: unknown
ram: unknown
storage: unknown
maintenance: active
latest release: v25.8.28.1-lts
latest release date: Jul 5, 2026
last commit: Jul 19, 2026
primary language: C++
github topics: ai, analytics, big-data, clickhouse, cloud-native, cpp, database, dbms, distributed, embedded, hacktoberfest, lakehouse, mpp, olap, rust, self-hosted, sql

Apache Airflow

App to programmatically author, schedule, and monitor workflows.

slug: apache-airflow
categories: automation, monitoring & status
publisher: apache (community)
website: https://airflow.apache.org
source code: https://github.com/apache/airflow
install docs: https://github.com/apache/airflow#readme
docs: https://github.com/apache/airflow#readme
docker: unknown
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: under 1gb
storage: high
maintenance: active
latest release: 3.3.0
latest release date: Jul 6, 2026
last commit: Jul 10, 2026
primary language: Python
github topics: airflow, apache, apache-airflow, python, scheduler, workflow, automation, dag, data-engineering, data-integration, data-orchestrator, data-pipelines, data-science, elt, etl, machine-learning, mlops, orchestration, workflow-engine, workflow-orchestration

Kong

API gateway for routing, securing, and observing services and microservice traffic.

slug: kong
categories: developer tools, networking & dns
publisher: Kong (community)
website: https://konghq.com/install
source code: https://github.com/Kong/kong
install docs: https://github.com/Kong/kong#readme
docs: https://github.com/Kong/kong#readme
docker: https://github.com/Kong/kong/blob/HEAD/scripts/upgrade-tests/docker-compose.yml
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: postgres, redis
ram: under 1gb
storage: high
maintenance: active
latest release: 3.9.3
latest release date: Jun 17, 2026
last commit: Jul 1, 2026
primary language: Lua
github topics: api-gateway, microservices, api-management, serverless, apis, reverse-proxy, cloud-native, microservice, devops, kubernetes, kubernetes-ingress-controller, kubernetes-ingress, ai, artificial-intelligence, ai-gateway, llm-gateway, openai-proxy, llm-ops, mcp, mcp-gateway

Jan

Runs local language models in a desktop chat interface with model downloads, assistants, extensions, and an API server.

slug: jan
categories: ai & ml
publisher: janhq
website: https://jan.ai/
source code: https://github.com/janhq/jan
install docs: https://jan.ai/docs/desktop
docs: unknown
docker: unknown
license: Apache-2.0
license type: permissive
source model: open source
surfaces: desktop, api
database: unknown
ram: unknown
storage: unknown
maintenance: active
latest release: v0.8.3
latest release date: Jun 24, 2026
last commit: Jul 17, 2026
primary language: TypeScript
github topics: chatgpt, gpt, llamacpp, llm, localai, open-source, self-hosted, tauri

HyperSwitch

Payment routing layer for connecting multiple processors behind one API.

slug: hyperswitch
categories: developer tools, finance & budgeting
publisher: juspay (community)
website: https://hyperswitch.io
source code: https://github.com/juspay/hyperswitch
install docs: https://github.com/juspay/hyperswitch#readme
docs: https://github.com/juspay/hyperswitch#readme
docker: https://github.com/juspay/hyperswitch/blob/HEAD/docker-compose.yml
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: postgres, redis
ram: under 1gb
storage: high
maintenance: active
latest release: v1.125.0
latest release date: Jul 10, 2026
last commit: Jul 10, 2026
primary language: Rust
github topics: payments, rust, orchestration, hacktoberfest, beginner-friendly, featured, high-performance, open-source, restful-api, sdk, works-with-react, finance, payment, payment-gateway, payment-integration, payment-processing, fintech, payments-platform, adyen, stripe

Appsmith

Build admin panels, CRUD apps and workflows, Build everything you need, 10x faster.

slug: appsmith
categories: developer tools
publisher: appsmithorg (community)
website: https://www.appsmith.com
source code: https://github.com/appsmithorg/appsmith
install docs: https://github.com/appsmithorg/appsmith#readme
docs: https://github.com/appsmithorg/appsmith#readme
docker: https://github.com/appsmithorg/appsmith/blob/HEAD/deploy/docker/docker-compose.yml
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: under 1gb
storage: high
maintenance: active
latest release: v2.2
latest release date: Jul 9, 2026
last commit: Jul 10, 2026
primary language: TypeScript
github topics: low-code, admin-dashboard, app-builder, internal-tools, custom-internal, java, javascript, typescript, react, admin-panels, workflows, crud, self-hosted, automation, developer-tools, low-code-framework, gui, gui-application, webdevelopment, hacktoberfest

Harness

Hosts source code, CI pipelines, developer environments, artifact storage, and deployment workflows in one service.

slug: harness
categories: automation, developer tools
publisher: harness
website: https://www.harness.io/open-source
source code: https://github.com/harness/harness
install docs: https://developer.harness.io/docs/open-source/
docs: unknown
docker: official
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web, cli, api
database: unknown
ram: unknown
storage: unknown
maintenance: active
latest release: v2.28.2
latest release date: Apr 20, 2026
last commit: Jul 15, 2026
primary language: Go
github topics: build-automation, build-pipelines, ci, ci-cd, code-repository, continuous-delivery, continuous-integration, docker, git, go, hacktoberfest, scm

CasaOS

Home server dashboard for managing files, storage, Docker apps, and personal services.

slug: casaos
categories: system admin & hosting
publisher: IceWhaleTech (community)
website: https://casaos.zimaspace.com
source code: https://github.com/IceWhaleTech/CasaOS
install docs: https://wiki.casaos.io/en/get-started
docs: https://wiki.casaos.io/en/home
docker: none
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: under 1gb
storage: high
maintenance: active
latest release: v0.4.15
latest release date: Dec 19, 2024
last commit: Aug 6, 2025
primary language: Go
github topics: docker, golang, vuejs, home-automation, home-server, raspberry, self-hosted, iot, home-cloud, casaos

Keycloak

Identity and access manager for SSO, user federation, and application login.

slug: keycloak
categories: identity & access, security & privacy
publisher: keycloak (community)
website: https://www.keycloak.org
source code: https://github.com/keycloak/keycloak
install docs: https://github.com/keycloak/keycloak#readme
docs: https://www.keycloak.org/documentation
docker: https://quay.io/repository/keycloak/keycloak
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: under 1gb
storage: high
maintenance: active
latest release: 26.7.0
latest release date: Jul 9, 2026
last commit: Jul 10, 2026
primary language: Java
github topics: keycloak, oidc, saml

filebrowser

Web File Browser with a Material Design web interface.

slug: filebrowser
categories: file sharing & sync
publisher: filebrowser (community)
website: https://filebrowser.org
source code: https://github.com/filebrowser/filebrowser
install docs: https://github.com/filebrowser/filebrowser#readme
docs: https://github.com/filebrowser/filebrowser#readme
docker: https://github.com/filebrowser/filebrowser/blob/HEAD/compose.yaml
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: redis
ram: under 1gb
storage: medium
maintenance: active
latest release: v2.63.18
latest release date: Jul 4, 2026
last commit: Jul 4, 2026
primary language: Go
github topics: file-browser, file-manager, file-sharing, go, material-design, self-hosted, vue

CyberChef

The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis.

slug: cyberchef
categories: system admin & hosting
publisher: gchq (community)
website: https://gchq.github.io/CyberChef
source code: https://github.com/gchq/CyberChef
install docs: https://github.com/gchq/CyberChef#readme
docs: https://github.com/gchq/CyberChef#readme
docker: https://github.com/gchq/CyberChef/blob/HEAD/Dockerfile
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: 1-2gb
storage: high
maintenance: active
latest release: v11.2.0
latest release date: Jun 17, 2026
last commit: Jul 5, 2026
primary language: JavaScript
github topics: data-analysis, data-manipulation, encryption, encoding, compression, parsing, hashing

SeaweedFS

Distributed storage system for S3 object storage, file volumes, metadata, and large file sets.

slug: seaweedfs
categories: developer tools, file sharing & sync, storage & backup
publisher: seaweedfs (community)
website: https://seaweedfs.com
source code: https://github.com/seaweedfs/seaweedfs
install docs: https://github.com/seaweedfs/seaweedfs#readme
docs: https://github.com/seaweedfs/seaweedfs#readme
docker: https://github.com/seaweedfs/seaweedfs/blob/HEAD/telemetry/docker-compose.yml
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: under 1gb
storage: high
maintenance: active
latest release: 4.39
latest release date: Jul 10, 2026
last commit: Jul 10, 2026
primary language: Go
github topics: distributed-storage, distributed-systems, s3, hdfs, fuse, distributed-file-system, hadoop-hdfs, posix, tiered-file-system, kubernetes, replication, object-storage, s3-storage, seaweedfs, erasure-coding, blob-storage, cloud-drive

Project N.O.M.A.D.

Offline-first knowledge base with local tools for notes, references, and field workflows.

slug: project-nomad
categories: storage & backup, wikis
publisher: Crosstalk-Solutions (community)
website: https://github.com/Crosstalk-Solutions/project-nomad
source code: https://github.com/Crosstalk-Solutions/project-nomad
install docs: https://github.com/Crosstalk-Solutions/project-nomad#readme
docs: https://github.com/Crosstalk-Solutions/project-nomad#readme
docker: https://github.com/Crosstalk-Solutions/project-nomad/blob/HEAD/Dockerfile
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: 2-4gb
storage: high
maintenance: active
latest release: v1.33.0
latest release date: Jun 23, 2026
last commit: Jun 23, 2026
primary language: TypeScript
github topics: unknown

changedetection.io

Website change monitor for tracking page updates and sending alerts when content changes.

slug: changedetection-io
categories: automation
publisher: dgtlmoon (individual)
website: https://changedetection.io
source code: https://github.com/dgtlmoon/changedetection.io
install docs: https://github.com/dgtlmoon/changedetection.io#readme
docs: https://github.com/dgtlmoon/changedetection.io#readme
docker: https://github.com/dgtlmoon/changedetection.io/blob/HEAD/docker-compose.yml
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: under 1gb
storage: medium
maintenance: active
latest release: 0.55.7
latest release date: May 25, 2026
last commit: Jul 10, 2026
primary language: Python
github topics: website-monitor, website-monitoring, change-detection, monitoring, self-hosted, change-alert, change-monitoring, website-change-monitor, url-monitor, website-change-detector, website-change-detection, website-change-tracker, website-change-notification, notifications, web-scraping, restock-monitor, website-defacement-monitoring, back-in-stock, website-watcher, rss

Hasura

GraphQL engine that exposes databases as realtime APIs with permissions and event triggers.

slug: hasura
categories: databases, developer tools
publisher: hasura (community)
website: https://hasura.io
source code: https://github.com/hasura/graphql-engine
install docs: https://github.com/hasura/graphql-engine#readme
docs: https://github.com/hasura/graphql-engine#readme
docker: https://github.com/hasura/graphql-engine/blob/HEAD/docker-compose.yaml
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: postgres, sqlite
ram: under 1gb
storage: medium
maintenance: active
latest release: v2.49.4
latest release date: Jul 8, 2026
last commit: Jul 8, 2026
primary language: TypeScript
github topics: graphql, graphql-server, postgres, hasura, access-control, automatic-api, api, rest-api, graphql-api, sql-server, bigquery, haskell, mongodb, subgraph, supergraph

ntfy

Send push notifications to your phone or desktop using PUT/POST.

slug: ntfy
categories: communication, networking & dns
publisher: binwiederhier (individual)
website: https://ntfy.sh
source code: https://github.com/binwiederhier/ntfy
install docs: https://github.com/binwiederhier/ntfy#readme
docs: https://github.com/binwiederhier/ntfy#readme
docker: https://github.com/binwiederhier/ntfy/blob/HEAD/docker-compose.yml
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web, cli, desktop, mobile
database: unknown
ram: under 1gb
storage: high
maintenance: active
latest release: v2.26.0
latest release date: Jul 9, 2026
last commit: Jul 9, 2026
primary language: Go
github topics: rest-api, pubsub, notifications, curl, push-notifications, ntfy, ntfysh

InfluxDB

Scalable datastore for metrics and real-time analytics.

slug: influxdb
categories: databases
publisher: influxdata (community)
website: https://influxdata.com
source code: https://github.com/influxdata/influxdb
install docs: https://github.com/influxdata/influxdb#readme
docs: https://github.com/influxdata/influxdb#readme
docker: https://github.com/influxdata/influxdb/blob/HEAD/Dockerfile
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: under 1gb
storage: high
maintenance: active
latest release: v3.10.0
latest release date: Jun 17, 2026
last commit: Jun 17, 2026
primary language: Rust
github topics: influxdb, monitoring, database, time-series, metrics, go, react, rust

RustFS

Distributed object storage server built in Rust for S3-compatible storage workloads.

slug: rustfs
categories: storage & backup
publisher: rustfs (community)
website: https://rustfs.com/download
source code: https://github.com/rustfs/rustfs
install docs: https://github.com/rustfs/rustfs#readme
docs: https://github.com/rustfs/rustfs#readme
docker: https://github.com/rustfs/rustfs/blob/HEAD/docker-compose.yml
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: 2-4gb
storage: high
maintenance: active
latest release: unknown
latest release date: unknown
last commit: Jul 10, 2026
primary language: Rust
github topics: bigdata, cloud-native, filesystem, object-storage, rust, s3, minio, amazon-s3, objectstorage, ai-native, multi-cloud, ai-storage

Jitsi Meet

WebRTC application that uses Jitsi Videobridge to provide high quality, scalable video conferences.

slug: jitsi-meet
categories: communication, video & conferencing
publisher: jitsi (community)
website: https://jitsi.org/meet
source code: https://github.com/jitsi/jitsi-meet
install docs: https://github.com/jitsi/jitsi-meet#readme
docs: https://github.com/jitsi/jitsi-meet#readme
docker: unknown
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: 1-2gb
storage: high
maintenance: active
latest release: stable/jitsi-meet_11031
latest release date: Jun 8, 2026
last commit: Jul 9, 2026
primary language: TypeScript
github topics: webrtc, sfu, video, video-conferencing, video-communication, jitsi, jitsi-meet, scalable-video-conferences, debian, deep-video

Harbor

Container image registry for storing, signing, scanning, and distributing OCI artifacts.

slug: harbor
categories: developer tools, security & privacy, storage & backup
publisher: goharbor (community)
website: https://goharbor.io
source code: https://github.com/goharbor/harbor
install docs: https://github.com/goharbor/harbor#readme
docs: https://github.com/goharbor/harbor#readme
docker: https://github.com/goharbor/harbor/blob/HEAD/tools/mockery/Dockerfile
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: 1-2gb
storage: high
maintenance: active
latest release: v2.15.2
latest release date: Jul 2, 2026
last commit: Jul 10, 2026
primary language: Go
github topics: cncf, container, registry, helm, cloud-native, containers, docker, kubernetes, cncf-project, container-management, container-registry, hacktoberfest

Chroma

Stores embeddings and documents for vector similarity search, metadata filtering, and retrieval-augmented applications.

slug: chroma
categories: ai & ml, databases, search
publisher: chroma-core
website: https://www.trychroma.com/
source code: https://github.com/chroma-core/chroma
install docs: https://docs.trychroma.com/docs/run-chroma/client-server
docs: unknown
docker: official
license: Apache-2.0
license type: permissive
source model: open source
surfaces: api
database: unknown
ram: unknown
storage: unknown
maintenance: active
latest release: 1.5.9
latest release date: May 5, 2026
last commit: Jul 18, 2026
primary language: Rust
github topics: agents, ai, ai-agents, database, rust, rust-lang

Authelia

Authentication gateway for adding login and two-factor checks before apps.

slug: authelia
categories: identity & access, security & privacy
publisher: authelia (community)
website: https://www.authelia.com
source code: https://github.com/authelia/authelia
install docs: https://github.com/authelia/authelia#readme
docs: https://github.com/authelia/authelia#readme
docker: https://hub.docker.com/r/authelia/authelia
license: Apache-2.0
license type: permissive
source model: open source
surfaces: web
database: unknown
ram: under 1gb
storage: high
maintenance: active
latest release: v4.39.20
latest release date: May 26, 2026
last commit: Jul 9, 2026
primary language: Go
github topics: totp, ldap, sso-authentication, yubikey, two-factor-authentication, docker, kubernetes, sso, multifactor, push-notifications, mfa, two-factor, authentication, security, golang, 2fa, oauth2, openid-connect, webauthn, passkeys