Rails 6 update notes

[viktorsmari]

Fablabs.io is now on Rails 5.2

Here are notes on how to upgrade to Rails 6:

• Change to rails 6 in Gemfile
• Disable gem rocket_pants in Gemfile or see if the gem supports Rails 6. See Consolidate API documentation and implementation #577
• Perform bundle update rails i18n-tasks
• Run and fix all tests with bundle exec rspec
• Preferably also update ruby version to latest 2.7.x (remember to also update in Dockerfile)

[MacTwister]

I’ve taken the lead on the Rails 6 upgrade in my spare time and have worked through the process, identifying and resolving all issues I could find. All tests are passing and the UI is working as expected.

Key changes:

• Upgraded to Rails 6.1
• Moved to Ruby 3.0
• Removed rocket_pants
• Updated many gems to their latest compatible versions

Check the PR to see full list of changes. I’ll go ahead and merge these changes so we can continue with future upgrades. Let me know if you have any questions or concerns.