Fixes to configuration

metasrht now runs and is accessible. The /register path is broken
though, and I'll need to play with NGINX proxying to fix it.
The container-internal web port (8080) is being appended to the URL. The
simplest solution is probably to switch the web port back to 80.
Need to setup SSL/TLS certificate as well, so that I only have to
migrate this once.

A minor issue: the web page reads "Welcome to localhost:5000!". It seems
the `origin` key in the config files needs to be the public address, not
the internal address.

Also, now ready for persistent git repos.