updated README.md (#1085)

Author: kvignesh1420

docs/tutorials/README.md

@@ -5,17 +5,29 @@ TensorFlow I/O welcomes and highly encourages tutorial contributions.
 
 ## How To Contribute
 
-I/O tutorials are created using [Google Colab](https://colab.research.google.com/) 
-and the jupyter notebooks are saved to this directory in the repository. To do 
+I/O tutorials are created using [Google Colab](https://colab.research.google.com/)
+and the jupyter notebooks are saved to this directory in the repository. To do
 this, follow the below steps:
 
-1. Create a new branch on your fork of TensorFlow I/O
-2. Goto [Google Colab](https://colab.research.google.com/) and start a new 
+1. Create a new branch on your fork of TensorFlow I/O.
+2. Goto [Google Colab](https://colab.research.google.com/) and start a new
 notebook using addons example template:
-[notebook template](https://github.com/tensorflow/docs/blob/master/tools/templates/notebook.ipynb)
-3. Edit the the links for the "View source on GitHub" and "Run in Google Colab" 
-URL boxes so that they match the name of your new example notebook
-4. Follow the guidelines of the template
-5. "Save a copy in Github" and select your new branch. The notebook should be 
-named `subpackage_submodule`
-6. Submit the branch as a PR on the TF-I/O [Github](https://github.com/tensorflow/io)
+[notebook template](https://github.com/tensorflow/docs/blob/master/tools/templates/notebook.ipynb).
+3. Edit the the links for the "View source on GitHub" and "Run in Google Colab"
+URL boxes so that they match the name of your new example notebook.
+4. Follow the guidelines of the template.
+5. "Save a copy in Github" and select your new branch. The notebook should be
+named `subpackage_submodule`.
+6. After step 5, the notebook will be committed to your branch directly from colab.
+However, to check for linting issues and to auto format your notebook, pull the changes to your system
+and run the following from the `io` directory:
+    ```console
+    $ sudo python3 -m pip install setuptools
+    $ sudo python3 -m pip install -U git+https://github.com/tensorflow/docs
+    $ echo "Auto format the notebooks: "
+    $ find docs -name '*.ipynb' | xargs python3 -m tensorflow_docs.tools.nbfmt
+    $ echo "Check for failed lint: "
+    $ find docs -name '*.ipynb' | xargs python3 -m tensorflow_docs.tools.nblint --arg=repo:tensorflow/io
+    ```
+7. Update `docs/tutorials/_toc.yaml` with the notebook details (please refer existing entries).
+8. Submit the branch as a PR on the TF-I/O [Github](https://github.com/tensorflow/io)