Allow server restarts when CF API key is invalid

### Enhancement Type

Improve an existing feature

### Describe the enhancement

Been having an issue with Curseforge recently where my API key keeps getting invalidated. Initial install with a fresh key works fine, but on restart I get the following error:

[mc-image-helper] 20:54:05.747 ERROR : Invalid parameter provided for 'install-curseforge' command: Access to https://api.curseforge.com is forbidden or rate-limit has been exceeded. Ensure CF_API_KEY is set to a valid API key from https://console.curseforge.com/ or allow rate-limit to reset.
[init] [ERROR] Failed to auto-install CurseForge modpack (B

This can be resolved by changing my organisation name in Curseforge, regenerating an apikey, and redeploying with this new key. This is obviously not a great method.

A variable that would allow the server to continue startup when Curseforge can not be reached would be amazing.

Start by tracing the server startup path that invokes the install-curseforge command and inspect how its failure currently stops initialization. Identify the existing configuration variables and command handling, then verify that the new opt-out behavior allows startup when CurseForge is unreachable while preserving the current failure behavior by default.

Written by the indexing model from the issue text.