enhancement/ Add some notes on Readme

[davidgk]

* Add some notes to README to improve the experience about running
  locally:
  * redis local conf
  * how to run with docker-compose
* enhance .env test example to allow running tests

Pull request type

• [ ] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [x] Documentation content changes
• [ ] Other (please describe):

What is the current behavior?

Trying to run it locally I found a couple of issues that maybe helps to be aware.

Issue Link: N/A

What is the new behavior?

Improve Knowledge about how to run it.