Further improve "run locally" docs
I made an effort to improve the docs in !1478 (comment 1017306267) but maybe degraded them in a few places.
There is definitely still room for improvement:
- What does "locally" mean?
- When might we use docker vs "native"? (e.g. debugging with binding.pry vs debugging production behaviour to avoid regressions such as MR example)
- Let's add the pry gem and include docs on how to use?
- More...