Flesh out CONTRIBUTING.md

[metasean]

We've done a quick draft of our thoughts on contributions for this project, but the actual CONTRIBUTING.md really needs some :heart:ing attention.

We highly recommend reading Kent C. Dodd's First Timers Only. We absolutely want to encourage beginners to make contributions, but we don't want to limit any contributions, so we've opted to highlight beginner-friendly issues.

[ShreyaSa]

Hi @metasean , I have gone through Kent C. Dodd's blog and would really like to contribute to your repo. I have some rough idea about Code Cafe - that, it's going to be a place for people who love coding to find like-minded friends over food and drinks. I would like to modify CONTRIBUTING.md and for that is there anything specific you want me to include in that file?

[metasean]

@ShreyaSa - Welcome and thank you so much for your interest!!!

While we definitely have some specific goals for the project, it is open source and we want anyone interested to be able to make contributions.

We definitely want to encourage contributors to do pair programming and TDD. Contributions include documentation, creating issues, adding tests, adding features, etc. are welcome.

The long-term goals for the project include:

• quickly and easily post a meeting at a specific time and specific place (e.g. from a phone)
• quickly and easily post a meeting at a specific time and then select from a range of possible meeting places within geographic range
• tag and give a description to a meeting (e.g. description: "I'll be working on CodeCafe", tags: ['JavaScript', 'react.js']
• quickly and easily find meetings in a certain geographic area and certain time frame
• have a personal profile
• have a network of friends
• receive notifications when a meeting is happening near you or is being hosted by a friend

Am I overlooking anything @PsychoLlama?