Add a CONTRIBUTING.md file for environment setup and tracking

[drwm-base]

Most projects that I found throughout Hacktoberfest had some sort of documentation that helped developers to set up their environment faster. As we add code to the project, we should have a centralized place to contain everything we need to get working on the project. It could also be used to track the progress of the project (what people are working on and where to look), according to the MVP Features.

As pull requests are merged, someone should be tracking and updating the CONTRIBUTING.md as needed. It could be a specific person, or a requirement that each pull request must update the CONTRIBUTING.md file if needed. This could also be tracked or linked to in the README or the overview.md doc as well.

A good start would be adding the Redis requirements and setup from #24 .

[drwm-base]

I will be working on this.