chore: update contributing.md

.github/CONTRIBUTING.md

@@ -5,3 +5,47 @@ We're so excited you're interested in helping with Authorizer! We are happy to h
 ## New to Open Source?
 
 1. Take a look at [How to Contribute to an Open Source Project on GitHub](https://egghead.io/courses/how-to-contribute-to-an-open-source-project-on-github)
+2. Go thorugh the [Authorizer Code of Conduct](https://github.com/authorizerdev/authorizer/blob/main/.github/CODE_OF_CONDUCT.md)
+
+## Where to ask Questions?
+
+1. Check our [Github Issues](https://github.com/authorizerdev/authorizer/issues) to see if someone has already answered your question.
+2. Join our community on Discord(TODO: coming soon) and feel free to ask us your questions
+
+As you gain experience with authorizer, please help answer other people's questions! :pray:
+
+## What to Work On?
+
+You can get started by taking a look at our [Github issues](https://github.com/authorizerdev/authorizer/issues)  
+If you find one that looks interesting and no one else is already working on it, comment in the issue that you are going to work on it.
+
+Please ask as many questions as you need, either directly in the issue or on [Discord](). We're happy to help!:raised_hands:
+
+### Contributions that are ALWAYS welcome
+
+1. More tests
+2. Improved Docs
+3. Improved error messages
+4. Educational content like blogs, videos, courses
+
+## Development Setup
+
+### Prerequisites
+
+- OS: Linux or macOS or windows
+- Go: (Golang)(https://golang.org/dl/) >= v1.15
+
+### Familiarize yourself with `authorizer`
+
+1. [Architecture of authorizer](TODO)
+2. [authorizer code and file structure overview](TODO)
+
+### Project Setup
+
+1. Fork the [authorizer](https://github.com/authorizerdev/authorizer) repository (**Skip this step if you have access to repo**)
+2. `git clone https://github.com/authorizerdev/authorizer.git`
+3. `cd authorizer`
+4. `mv .env.sample .env`. Check all the supported env [here](TODO)
+5. Build the code `make clean && make`
+   > Note: if you don't have [`make`](https://www.ibm.com/docs/en/aix/7.2?topic=concepts-make-command), you can `cd` into `server` dir and build using `go build` command
+6. Run binary `./build/server`