[improvement] add support for auth + reverse proxy support

[xInsertx]

Especially for docker containers, it would be useful to have some basic authentication support (to protect from abuse) as well as supporting reverse proxy headers.

edit: I just saw on roadmap 'login screen', as this could be form-based login,

[AMJidovu]

This is a really good enhancement for unraid users. 👍 for this enhancement.

[biodrone]

Forgot to comment this when I made the README update but there's now a section that details how to run the Docker container with Reverse Proxies as well as some configs for popular ones to get start if you haven't got one setup already: https://github.com/XiovV/go-auto-yt#reverse-proxies