* Document RELEASING.md process
* Bump version numbers
* Do not automatically produce GH releases, and do not build binaries to attach to them
* Only build docker images on tags
* Use the `latest` Docker image tag in the Docker-compose config
This is intended to support the user journey of someone with a VPS who
wants to set up the sync server, but does not have the knowledge and
skills to set up a reverse proxy and TLS certificate themselves.
