Bug: Output thousands of lines when WebUI or healthcheck server port been used by another program.

[Cassy-Lee]

TLDR: Output thousands of lines when WebUI or healthcheck server port been used by another program.

1. Is this urgent: No
2. DNS provider(s) you use: unnecessary
3. Program version:
   Running version 2.6.0 built on 2024-02-03T18:57:00Z (commit c338c28ce3ab3aa9948f0fe133307b75fe6d34d2)
4. What are you using to run the container: using zero-dependency binary
5. Extra information (optional)
   Host OS: linux aarch64

Simple solutions:
Give options to disable unnecessary features(WebUI and health server). Such as "DISABLE_WEBUI" and "DISABLE_HEALTH_SERVER" environment variables.
Add retry limit for server restart to avoid spam.

Suggestions:
Allow some configs in the config file, not only command line and environment variables.
Remove (or disable) features for dockers in the standalone binary.

[qdm12]

Remove (or disable) features for dockers in the standalone binary.

Done in 776206e - the healthcheck server won't run when outside Docker 😉

Add retry limit for server restart to avoid spam.

This is solved from commit 130ab00 where a critical error terminates the whole program. Only the backup service is auto-restarted (to zip config.json and updates.json).

Give options to disable unnecessary features(WebUI and health server)

I don't think anyone would want to disable the web ui or the health server when in Docker really, since they can just not publish ports etc. I have however added SERVER_ENABLED in cc995a7 to disable the http server (web ui) when running outside Docker since it could get handy.