Heroku エラー

Herokuでデプロイしようとした結果以下のようなエラーが出てしまいました
https://teratail.com/questions/132715
これを実行したらエラーが出てきてしまいました
今日使い始めたばかりで、理解が難しいです
宜しくお願いします

Enumerating objects: 894, done.
Counting objects: 100% (894/894), done.
Delta compression using up to 4 threads
Compressing objects: 100% (845/845), done.
Writing objects: 100% (894/894), 128.23 KiB | 3.46 MiB/s, done.
Total 894 (delta 520), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> App not compatible with buildpack: https://github.com/heroku/heroku-buildpack-nodejs
remote:        
remote:  !     ERROR: Application not supported by 'heroku/nodejs' buildpack
remote:  !     
remote:  !     The 'heroku/nodejs' buildpack is set on this application, but was
remote:  !     unable to detect a Node.js codebase.
remote:  !         
remote:  !     A Node.js app on Heroku requires a 'package.json' at the root of
remote:  !     the directory structure.
remote:  !     
remote:  !     If you are trying to deploy a Node.js application, ensure that this
remote:  !     file is present at the top level directory. This directory has the
remote:  !     following files:
remote:  !     
remote:  !     app/
remote:  !     bin/
remote:  !     config/
remote:  !     config.ru
remote:  !     db/
remote:  !     Gemfile
remote:  !     Gemfile.lock
remote:  !     lib/
remote:  !     log/
remote:  !     public/
remote:  !     Rakefile
remote:  !     README.md
remote:  !     spec/
remote:  !     test/
remote:  !     tmp/
remote:  !     vendor/
remote:  !         
remote:  !     If you are trying to deploy an application written in another
remote:  !     language, you need to change the list of buildpacks set on your
remote:  !     Heroku app using the 'heroku buildpacks' command.
remote:  !         
remote:  !     For more information, refer to the following documentation:
remote:  !     https://devcenter.heroku.com/articles/buildpacks
remote:  !     https://devcenter.heroku.com/articles/nodejs-support#activation
remote: 
remote: 
remote:        More info: https://devcenter.heroku.com/articles/buildpacks#detection-failure
remote: 
remote:  !     Push failed
remote: Verifying deploy...
remote: 
remote: !	Push rejected to whispering-ridge-73721.
remote: 
To https://git.heroku.com/whispering-ridge-73721.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/whispering-ridge-73721.git'