feature: Configurable Resolver in Docker Container

[DaDummy]

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

Currently the penpot docker containers do not properly work when run with kubernetes.

This stems from the issue that the nginx resolver is hardcoded to be 127.0.0.11: https://github.com/penpot/penpot/blob/1c1397a5d85d41f1588e93cb16aa26c023257635/docker/images/files/nginx.conf#LL41C14-L41C24

But for kubernetes you need to use kube-dns.kube-system.svc as resolver instead.

Describe the solution you'd like.

Adjust nginx.conf and the Dockerfiles to allow overriding the default resolver through an environment variable as has been done for e.g. PENPOT_BACKEND_URI.

Describe alternatives you've considered.

No response

Additional context

No response

[niwinz]

Should be fixed in 1.18.6, you should use the PENPOT_INTERNAL_RESOLVER to specify a custom resolver

[DaDummy]

Thanks!