Thanks for the quick reply!
I also had that doubt initially, i am pointing to this config explicitly in my startup command, some other parts of the config (auth) is being read so that’s not the issue
your right, in my example i forgot the user in my URL. my actual URL is: https://myFQDN/user/USERNAME/lab/test-server which creates the following log:
13:12:15.551 [ConfigProxy] error: 503 GET /user/USERNAME/static/lab/9265.bc2b66a4502cdfcfc14f.js socket hang up