Too Long; Didn't Read
A simple way to deploy any SPA to Heroku is to skip the build process completely. The build process fails on Heroku because of some of the packages that Heroku failed to use for some reason. To use this deployment flow all you have to do is build your app locally and push it to the Heroku platform. It might help you if you can build your application locally without any problems, but if you are just hacking something and can’t figure out why your builds fail this might do the job.
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