Gitea 1.12.0 brings much improved git repo performance. Specifically it
caches the most recent commits helping the web views render much more
quickly.
This bumps our golang base image to 1.14-buster as gitea has changed
their default golang verison to 1.14. We also add gnupg to the package
install list as the upstream images did this.
In the templates I've tried to comment out rather than remove content
that we don't want exposed. The reason for this is it makes resolving
future template updates simpler.
For v1.12.0 release notes see:
https://github.com/go-gitea/gitea/blob/v1.12.0/CHANGELOG.md
Change-Id: I8fd6587c8962554023d878266055a2bd9d2499f9
4f405f13f5