Remove VERSION file in favour of version entry in `package.json`. Parse
this version in our build server scripts.
This commit also introduces `standard-version` which we can use to
generate our `CHANGELOG.md` with `yarn run release`.
close#1831
So I had `DOCKER_CLI_EXPERIMENTAL=enabled` enabled by default and
couldn't reproduce the error on my machine. This time I'm pretty sure it
works as expected.
The Dockerfile is still using `apk` instead of `apt-get` (Debian slim).
So that's why our build server was never successfully pushing the
`maintenance-worker` image.
Inspired by the tagging of e.g. `node` on dockerhub:
https://hub.docker.com/_/node/?tab=description
I would like to push the current version of all our images to dockerhub.
This is a first step to push to production later on.
If sb. increments the VERSION file, this is considered a release.
