Add link to directions on homepage

This release adds links to the homepage of the Andromeda app that point back to the GitHub repo for source code and guides.

What's Changed

• Add commit hash for v1.3.0 by @egrace479 in #105
• Add note directing user to GitHub for source code and guides by @egrace479 in #106

Full Changelog: 1.3.0...1.3.1