Add CONTRIBUTING.md File to Repo pointing to github.com/dwyl/contributing

[nelsonic]

As a person who is new to the DWYL Org/Community 🆕
I need to know how to contribute to the project effectively 💭
so that I can start my journey towards Doing What I Love with my Life! ❤️ ✅ 😂

Markdown:

_**Please read** our_
[**contribution guide**](https://github.com/dwyl/contributing)
(_thank you_!)

Note: these are line-separated but in the actual rendered page it's all one line.
see: https://github.com/dwyl/contributing/blob/master/CONTRIBUTING.md

[karinakozarova]

Should the contributing.md be a link to the DWYL contributing.md or a copy of the whole contributing.md?
If it's the first, I can add a PR 😄

[nelsonic]

@karinakozarova good question, we usually just create a link to the main one. 👍

[nelsonic]

done. 👍