Revamp dredd init

[honzajavorek]

🚀 Why this change?

• dredd init was in terrible state, so this is a bit of love to make it better
• CircleCI 1.0 sunset is very close

⚠️ Flaws

This is a great opportunity to add missing integration tests, but for time constraints reasons I cannot add them right now. That should not make the code worse though as there were no integration tests before the change either.

📝 Related issues and Pull Requests

• Close Improve wording and behavior of dredd init #879
• Close Interactive config should employ better algorithm to detect installation command in CI config files #525
• Close Dredd's init should support creating more CI configurations #878
• Implements parts from New dredd init & config & CLI #1101

✅ What didn't I forget?

• To write docs
• To write tests
• To put Conventional Changelog prefixes in front of all my commits and run npm run lint

[kylef]

Might also be worth mentioning that apiaryio/dredd image can be used if all you need is Dredd like in your example.

In real world you will need an image capable of running Dredd alongside the users app, so I think it is worth mentioning that the circle CI images -node-browsers images adds Node to other languages, for example: circleci/python:3-node-browsers image can be used for Python apps.

[honzajavorek]

Those are good points. I'm recording them here: #353 (comment)

[honzajavorek]

@kylef Thank you very much for the review! ❤️