Added "How to Contribute section to README"

README.md

@@ -1 +1,32 @@
 # GoodFirstIssue
+
+## How to Contribute
+
+Contributions are welcome, including from first-time open-source contributors.
+
+1. Read the existing README and `spec.md` to understand the project's intent before making changes.
+2. Check the [Issues page](https://github.com/pranaykgupta/GoodFirstIssue/issues) for open tasks, and look for issues labeled `good first issue` if you're new to the project.
+3. Fork the [repository](https://github.com/pranaykgupta/GoodFirstIssue).
+4. Clone your fork:
+   ```bash
+   git clone <your-fork-url>
+   cd GoodFirstIssue
+   ```
+5. Create a new branch off `master`:
+   ```bash
+   git checkout -b your-branch-name
+   ```
+6. Make a focused change — avoid unrelated edits, and follow the existing code style in the file you're editing.
+7. Run the test suite before committing:
+   ```bash
+   npm test
+   ```
+8. Commit your changes with a clear, descriptive message:
+   ```bash
+   git commit -m "Describe your change here"
+   ```
+9. Push your branch:
+   ```bash
+   git push origin your-branch-name
+   ```
+10. Open a [Pull Request](https://github.com/pranaykgupta/GoodFirstIssue/pulls), briefly explaining what you changed and why.