This is the Heroku buildpack for Deno apps.
Web processes must bind to $PORT, and only the HTTP protocol is permitted for incoming connections.
The buildpack parse Procfile and download all dependencies at push time.The downloaded files are cached.
https://github.com/chibat/heroku-deno-getting-started
To specify your Deno version, you also need a runtime.txt file - unless you are using the latest Deno runtime version.
$ cat runtime.txt
v1.8.2
If your app has a build step that you’d like to run when you deploy, write the required processing in heroku_build.ts.
You may be able to avoid the following error by building in advance.
Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch