Split documentation for easier updates

docs/git_commands.md

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+## Git Commands
+Specify the ```GIT_EMAIL``` and ```GIT_NAME``` variables for this to work. They are used to set up git correctly and allow the following commands to work.
+
+### Push code to Git
+To push code changes made within the container back to git run:
+```
+sudo docker exec -t -i <CONTAINER_NAME> /usr/bin/push
+```
+### Pull code from Git (Refresh)
+In order to refresh the code in a container and pull newer code from git run:
+```
+sudo docker exec -t -i <CONTAINER_NAME> /usr/bin/pull
+```