Add the ability to turn on/off some features

[reel]

The main idea is to be able to turn on/off some features with .env or via package.json:

  ...
  "henri" {
    "frontend": false,
    "backend": true,
    "socketio": false,
    "rest": true
  }

Similar options in ,env file or via environment variables:

HENRI_OPTS="frontend=false;backend:true;socketio:false;rest:true"

Defaults to true if missing.

So, if you want to deploy multiple backends without nextjs overhead (?!?) or vice-versa, this can be done easily.

backend: false would disable mostly everything but Next.js

Is this necessary? Are there use cases? cookies would not be parsed and SSR partially broken without data injection...

[reel]

If you don't define something in the configuration, it will not load (next, socketio, rest, auth)