Create documentation for contributors

[Dripcoding]

Is your feature request related to a problem? Please describe.
Contributors should have documentation that will make it easier for them to contribute to the project.
This documentation should contain steps to:

• install project locally
• run tests and tools locally
• open pull requests
• install required tools like Docker
• recommend best practices and link to resources for technologies used

Describe the solution you'd like
I'd like to see a Contributing.md that will act as a starting point for all contributors.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.
I've considered using a solution like docsifjs to create a documentation site. However I prefer to keep things simple at the start.

Additional context
Add any other context or screenshots about the feature request here.

Would you like to help fix this issue?
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I'd like to help with this issue.

[preetkaran20]

also integrate running of the unit test along with PR build in Github actions.