Heroku deployment failed: Push rejected due to lack of a Cedar-supported application

Trying to deploy my 3D game (created with three.js) on a Heroku server has brought up an issue. After running the command "git push heroku master," I encountered the following problem: 

Initializing repository, done.
Counting objects: 252, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (251/251), done.
Writing objects: 100% (252/252), 2.38 MiB | 89.00 KiB/s, done.
Total 252 (delta 55), reused 0 (delta 0)

-----> Removing .DS_Store files

 !     Push rejected, no Cedar-supported app detected

To <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="afc8c6dbefc7caddc0c4da81ccc0c2">[email protected]</a>:infinite-woodland-7676.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9cfbf5e8dcf4f9eef3f7e9b2fff3f1">[email protected]</a>:infinite-woodland-7676.git'

Link to repository --> https://github.com/mkkroliks/Snake3d

I'm relatively new to using Heroku, so the solution might be simple, but I haven't been able to find one online.

javascriptgitherokuthree.js

Answer №2

In my personal experience, there are four common issues that may arise.

To start with, one must ensure that the Procfile is set up correctly to execute the necessary script. It should include a line like:

node server.js

Secondly, it is essential to confirm that the package.json file lists all required dependencies and includes the npm start key. To validate the dependencies, remove the node_modules folder, execute "npm install --production", and then attempt to launch the application. Any missing dependencies will result in a module error.

Next, verify that the application functions properly in the context of heroku's environment. Enter "foreman start web" in the command line from the directory containing the Procfile, and access your site at localhost:5000.

Lastly, a potential error source (which I encountered myself) is the placement of the Procfile and package.json files. These files must be located in the root directory of the git repository. Foreman may still work if the files are not in the root directory, so it is prudent to double-check their location.

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