https://github.com/chibat/heroku-buildpack-deno
Make sure you have Deno and the Heroku CLI installed.
$ git clone https://github.com/chibat/heroku-deno-postgres-example.git
$ cd heroku-deno-postgres-example
$ export DATABASE_URL=${YOUR_HEROKU_DATABASE_URL}
$ ./app.ts
$ curl -i http://localhost:8080
HTTP/1.1 200 OK
content-type: application/json
content-length: 13
date: Wed, 11 Aug 2021 11:42:53 GMT
[["pg_type"]]
...