Hello, I have an existing swift project that I'm trying to add to heroku.

I'm creating a new application on heroku and pushing the code but get this error.

remote: Building source:
remote:
remote: -----> Swift app detected
remote: fatal: not a git repository (or any parent up to mount point /)
remote: Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
remote: ! Push rejected, failed to compile Swift app.
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to (app).
remote:
To https://git.heroku.com/(app).git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/(app).git'

Basically the git repository on heroku isn't initialized, but not sure how to do that from my side.