Fix: Added redirection to GitHub index when no hash present

[siyaramsujan]

Fixes: #1783

Changes:

Added redirection to the GitHub repository index when the path variable is empty.

[SkyeYoung]

Thanks for the contribution! The logic should be fine.

cc @bzp2010 @guoqqqi pls review this

[siyaramsujan]

Thank you, I have just made the update.

[yzeng25]

PTAL @SkyeYoung