Run collectstatic, migrate and compress in entrypoint

Ghost User
2019-02-22T17:20:30+01:00

### One-sentence description Run `collectstatic`, `migrate` and `compress` in the Docker entrypoints. ### Why? At the moment they need to be run manually. In #serverconfig we have a bit of [a hacky script](https://gitlab.science.ru.nl/thalia/serverconfig/blob/master/roles/concrexit/templates/migrate.sh.j2) that runs the (using a none production entrypoint) commands.