Fly + PlanetScale + Rails example dockerfile

If you are debugging this error: LoadError: libmariadb.so.3: cannot open shared object file: No such file or directory - /rails/vendor/bundle/ruby/2.7.0/gems/mysql2-0.5.5/lib/mysql2/mysql2.so The fix is having these packages installed for production: default-mysql-client default-libmysqlclient-dev Here's a full