🦸 Update CONTRIBUTING.md with "Submitting a Pull Request (PR)" instructions

Author: SkalskiP

CONTRIBUTING.md

@@ -1,8 +1,21 @@
 ## 🦸 Contributing to Roboflow Notebooks
 
-We love your input! We want to make contributing to Roboflow Notebooks as easy and transparent as possible.
+We love your input! We want to make contributing to Roboflow Notebooks as easy and transparent as possible, whether it's:
 
-- When creating new notebook, make sure to use our [template](https://github.com/roboflow-ai/notebooks/blob/main/notebooks/_train-template.ipynb) as starting point. It contains all the elements that we would like to include in our notebooks from now on.
-- When adding or editing notebooks, make sure to specify the versions of pip packages 📦 you are using.
+- Reporting a bug
+- Discussing the current state of the code
+- Submitting a fix
+- Proposing a new feature
+- Becoming a maintainer
 
-Please keep in mind that repository is still under construction 🚧. We will add more contribution guidelines soon.
+## 🛠️ Submitting a Pull Request (PR)
+
+- Add new notebook `.ipynb` file to `notebooks` directory.
+- Add new entry to `automation/notebooks-table-data.csv` file.
+- Run `automation/autogenerate_notebooks_table.py` script. Roboflow Notebooks table in `README.md` will update 
+automatically.
+- Commit changes to feature branch. Create PR.
+
+## © License
+
+By contributing, you agree that your contributions will be licensed under the [MIT](https://github.com/roboflow/supervision/blob/main/LICENSE.md) license.