No commit hash on the deployed project

[ahangarha]

Since we don't push the .git directory, we don't have access to the commit hash of the deployed app.

react-webpack-rails-tutorial/.dockerignore

Lines 46 to 48 in 764a299

	# Specific to .dockerignore
	.git/
	.github/

Should we include .git, or is there a better way to not keep the whole .git directory in the docker image?