We're going to want Docker hosts to run this script instead of `docker compose` and `docker-compose` commands. More details on why it's necessary in DSOMETHING and [ENG-1230](https://linear.app/comm/issue/ENG-1230/keyserver-mysql-backups-not-saving-on-linux-docker-hosts).
Making this a bash script instead of a `yarn` script so that Docker hosts don't need to install yarn in order to run it.
Depends on D4212