proxy ESAP API from port 5555 to 80
Some institutes block port 5555 in their firewall (like the university of Edinburgh). Also MyBinder is very restricted in ports it can use, it must be either http(s) or the git port.
The backend must be reached from the frontend on port 80/443
This can be accomplished by adding a proxy in the nginx configuration that is now onboard ESAP and which is spun up with the docker-compose file.
Beware that this also means that the redirect addresses in the oidc.env file and on the IDM website need to be changed on this site: https://iam-escape.cloud.cnaf.infn.it/manage/dev/dynreg