Removed Dockerfile as we're deploying to Heroku at the moment, and therefore don't need Docker.
Removed run.py as we don't need it.
Added dev to gitignore so the dev scripts don't end up checked in the build.
Added a default run.sh (not executable) to be run via the dev/run-app command installed by the bootstrapper.

Now, if you've created this repo with the boostrapper you can start the app with
./dev/run-app