chore: Create CONTRIBUTING.md

Author: manthanank

CONTRIBUTING.md

@@ -0,0 +1,12 @@
+# Contributing
+
+Thank you for considering contributing to this project! By this, you
+agree to abide by the [Code Of Conduct](https://github.com/manthanank/learn-javascript/blob/main/CODE_OF_CONDUCT.md).
+
+## How to Contribute
+
+- If you find a bug, please [open an issue](https://github.com/manthanank/learn-javascript/issues).
+- If you want to contribute code, please follow these steps:
+  1. Fork the repository.
+  2. Create a new branch for your feature or bug fix.
+  3. Make your changes and submit a pull request.