我有简单的html，css和javascript，我似乎无法推送到Heroku。不确定是什么问题。以下是我得到的错误。
Counting objects: 75, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (72/72), done.
Writing objects: 100% (75/75), 879.94 KiB | 20.46 MiB/s, done.
Total 75 (delta 33), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: ! No default language could be detected for this app.
remote: HINT: This occurs when Heroku cannot detect the buildpack to use for this application automatically.
remote: See https://devcenter.heroku.com/articles/buildpacks
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to brians-rock-paper-scissors.
remote:
To https://git.heroku.com/brians-rock-paper-scissors.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/brians-rock-paper- scissors.git'
查看构建包的文档后，我似乎无法看到任何可以帮助我的内容。任何帮助将不胜感激。