update documentation
All Submissions:
- [YES] Have you added an explanation of what your changes do and why you'd like us to include them?
- [YES] I have updated the documentation accordingly.
- [YES] My code follows the code style of this project.
Current Behavior or Linked Issues
- Fix broken link in the documentation.
- Made GIT_REPO variable optional in
common_prepare.sh
script to support optional flux repository. - Related to #318
Does this introduce a breaking change?
- [NO]