It's used in prod, should be done here too then.
Alpine doesn't provide this package, so we'll need to compile it ourself.
Confirmed working with `MALLOC_CONF=stats_print:true ruby -e "exit"`
To see the changes persisted into the container run `docker-compose` build
`docker-compose down -v` no longer requires to reinstall gems/packages
It's also possible to have branches with different gemfiles, without having
to install between them constantly
