解决方法:
heroku config:add BUILDPACK_URL=https://github.com/heroku/heroku-buildpack-nodejs
git commit -am "empty" --allow-empty
git push Heroku master
解决方法:
heroku config:add BUILDPACK_URL=https://github.com/heroku/heroku-buildpack-nodejs
git commit -am "empty" --allow-empty
git push Heroku master