Configuration file jitsi-meet

I’m developing my custom very basic application and I have a doubt about how jitsi works.
I’m noticing that if I install the application via deb files, the file is configured with my server url.
If I execute the jitsi environment using the project docker-jitsi-meet, the file config.js is not modified.

Can you point me how jitsi-meet web app uses the config file?
Thank you very much

ok, by default it does not use the config file,
but I noticed that if I change a parameter in the config.js (i.e. lastN param), I can see a different behavior.
thank you for your answer