* Create entrypoint-dev.sh to be used with devel workflows with docker/podman compose
and adjust the compose files to use it.
* Adjust the entrypoint script so we have better control over when we run
rake assets:precompile and rake app_initializer:setup.
* Copy vendor/cache so we can bundle install from cached gems instead of
fetching them from the Internet.
* Run rake assets:precompile in the container build.
* Add in clobber and clean tasks to entrypoint.
