support reload with docker image

[durandom]

I'd like to see live edits I'm doing.

There was a reload api, but it got removed? Can I start the container in development mode?

tried this, but that results in an empty reply from the server.

	docker run -p 8080:8080 -v `pwd`:/app-data \
		-ti --rm \
		--name kubeflow_workshop \
		-e CONTENT_URL_PREFIX="file:///app-data" \
		-e WORKSHOPS_URLS="file:///app-data/_workshop1.yml" \
		-e LOG_TO_STDOUT=true \
		-e RAILS_ENV=development \
		quay.io/osevg/workshopper