Error deploying rails app to heroku

Hi there I’m trying to deploy a ruby on rails app to heroku however am getting the following error:

at=error code=H10 desc=“App crashed” method=GET path="/" host=obscure-plateau-35703.herokuapp.com request_id=9a3940cd-565b-4943-98cc-351a8da03b0e fwd=“94.4.124.132” dyno= connect= service= status=503 bytes= protocol=https

2020-04-21T17:23:46.459103+00:00 heroku[router]: at=error code=H10 desc=“App crashed” method=GET path="/favicon.ico" host=obscure-plateau-35703.herokuapp.com request_id=7a7128b1-bd42-4589-b717-1424baf29b8f fwd=“94.4.124.132” dyno= connect= service= status=503 bytes= protocol=https

It said it had deployed but it’s not running and I also had the following:

WARNING:

remote:
remote: Detecting rails configuration failed
remote: set HEROKU_DEBUG_RAILS_RUNNER=1 to debug
remote:
remote: ###### WARNING:
remote:
remote: We detected that some binary dependencies required to
remote: use all the preview features of Active Storage are not
remote: present on this system.
remote:
remote: For more information please see:
remote:
remote:
remote:
remote: ###### WARNING:
remote:
remote: There is a more recent Ruby version available for you to use:
remote:
remote: 2.6.6
remote:
remote: The latest version will include security and bug fixes, we always recommend
remote: running the latest version of your minor release.
remote:
remote: Please upgrade your Ruby version.
remote:
remote: For all available Ruby versions see:
remote:
remote:
remote: ###### WARNING:
remote:
remote: No Procfile detected, using the default web server.
remote: We recommend explicitly declaring how to boot your server process via a Procfile.
remote:
remote:

Would anyone know how to make this work?