[recipe] [K8s] [essentials] Traefik-forward-auth/authentication provider

[MegaShinySnivy]

🤪 Sanity check

• I have searched and confirmed no existing open / closed issues, or open / closed PRs exist for this recipe
• I have confirmed that the app is actively supported by its developers (i.e., not deprecated or abandoned)

📜 Description

Authentication providers are an essential part of any homelab, especially one that may have public-facing services. To this end, I would like to see Traefik-forward-auth added as a middleware choice.

I have already completed setup with Google Oauth and just need a bit of assistance with polishing and documentation.

Nice-To-Haves would also be other providers like Authelia or Keycloak with LDAP

🏠 Project Homepage

https://github.com/thomseddon/traefik-forward-auth

💬 Your Discord username

megashinysnivy#9000

🤹‍♀️ Orchestration Platform

• I'm interested deploying the app into Docker Swarm using manual editing and classic docker stack deploy
• I'm interested deploying the app into Docker Swarm using premix's automated ansible playbooks
• I'm interested deploying the app into Kubernetes using premix's helm charts

💍 Engagement

• I plan to test the recipe after publication and provide feedback
• I'm happy to provide community support in Discord re the recipe
• I plan to submit a PR for this recipe myself 🏆

Code of Conduct

• I agree to follow this Geek Cookbook's Code of Conduct

🔐 Authentication

The app provides its own, trustworthy authentication, or access control is unnecessary. I'd be happy exposing it to the internet

💼 Config Management

The app is configured with environment variables, The app is configured with a static config file on the filesystem

💼 Connnectivity

The app requires inbound web access HTTP/S access

💾 Data persistence

The app needs no persisted data

🪂 Backup

The app does not require backup