More examples for docker-compose

Hello, Users are looking for docker-compose files that support other configurations, e.g. using LocalExecutor, MySQL and others. We can prepare a wizard that will allow you to generate the necessary files, or simply add a few sample configurations and users will have to create less typical configurations themselves. Related ticket https://github.com/apache/airflow/issues/8605#issuecomment-759469443 Rrlated discussion: https://apache-airflow.slack.com/archives/CCQ7EGB1P/p1621711385211600 CC: @marclamberti @potiuk