Is your feature request related to a problem? Please describe.

The default "settings.yml" of the official docker image has only html format enabled by default and each update of the image overwrites any changes on this setting through a "settings.yml.new" resulting any calls for json, rss or csv from connected services to fail.

Describe the solution you'd like

Include at least json as default seting. As far I'm aware it's much standard and am not aware of any obvious security issues.

Describe alternatives you've considered

That subsequent updates would just avoid overwriting the formats' setting.

Additional context

Also take into consideration the current (and rising) number of RAG-based FOSS projects using searxng as the search backend, which seem to overwrite the settings "manually" to enable json outputs.