Deploy to Heroku not working

[NessConnery]

I get error "No app.json located in the repo URL provided"

[OSwoboda]

Do it from this URL: https://github.com/emeth-/pokelocater
Not from https://github.com/emeth-/pokelocater/blob/master/README.md

[NessConnery]

Okay it's built now but I just get a page that says

"Heroku | Welcome to your new app!
Refer to the documentation if you need help deploying."

And a white screen. Any help? I'm not familiar with using heroku