Trouble with a rails app

[joshfester]

I copied the ENV and Procfile from the example rails app, but running into an issue deploying. Here's the output when I try it:

remote: Resolving deltas: 100% (479/479), done.
remote: -----> Creating app 'stocksgalaxy'
remote: warning: remote HEAD refers to nonexistent ref, unable to checkout.
remote:
remote: -----> Deploying app 'stocksgalaxy'
remote: HEAD is now at c72c467 piku config
remote: -----> Ruby Application app detected.
remote: -----> Checking requirements: ['ruby', 'gem', 'bundle']
remote: [None, None, None]
remote: -----> Could not detect runtime!

Any help would be greatly appreciated! I'm hoping to switch from Dokku to Piku so that I can use ARM servers

[rcarmo]

Well, it would be great if you had Ruby installed - because that's what's the last few lines are telling you :)

[joshfester]

That makes a lot of sense 🤓 ...I'm too used to Dokku!

[chr15m]

If somebody can tell me the packages required I'll add them to a bootstrap playbook.

[joshfester]

Rails has an official Dockerfile generator that uses these (debian) packages by default:

• build-essential
• curl

Most Rails projects are also using Postgres, which needs these for the pg gem:

• libpq-dev
• postgresql-client

For installing Ruby, the best option by far imo is asdf. It's extremely simple and Just Works™️

The Rails Dockerfile also does some things with bundle, but that may be beyond the scope here