[SOLVED] How can I set up a local SSL certificate and a Rails application?

How can I set up a local SSL certificate and a Rails application?

This might be a two-in-one question.

I have a Rails application for home/hobby usage, hosted on a Raspberry Pi and I was wondering if it's possible to create a local SSL certificate for it and setup Rails to use it?
If yes, how can I setup my Rails/Puma/Foreman/Ubuntu application? For now, I am running the application with Foreman, by using a Procfile:
```
web: bundle exec puma -t 8:8 -p 3000
worker: bundle exec sidekiq
clock: bundle exec clockwork config/clock.rb
```

Solution

My procfile contains an entry that looks like this:

server: rails server puma -b 'ssl://0.0.0.0:3000?key=server.key&cert=server.crt'

This seems to work for me. I also set

config.force_ssl = true

in config/application.rb

I gathered info about it from all these places: