Also fixes the file path to work from Docker
Test plan:
* Follow instructions in `development_with_docker.md` and make sure it
behaves as expected
Change-Id: I0093b036c33b2d6f6e002f03ab16e89cf29d9a3d
Reviewed-on: https://gerrit.instructure.com/94001
Tested-by: Jenkins
Reviewed-by: Jeremy Neander <jneander@instructure.com>
Reviewed-by: Derek Bender <djbender@instructure.com>
Product-Review: Derek Bender <djbender@instructure.com>
QA-Review: Derek Bender <djbender@instructure.com>