add contributing readme

Author: dpgraham4401

CONTRIBUTING.md

@@ -0,0 +1,34 @@
+[![Jazzband](https://jazzband.co/static/img/jazzband.svg)](https://jazzband.co/)
+
+This is a [Jazzband](https://jazzband.co/) project. 
+By contributing you agree to abide by the [Contributor Code of Conduct](https://jazzband.co/about/conduct) and follow the [guidelines](https://jazzband.co/about/guidelines).
+
+## Contributing to Django Fernet Encrypted Fields
+
+We welcome contributions from the community to improve and maintain Django Fernet Encrypted Fields. 
+Please follow these guidelines to ensure your contributions are accepted:
+
+1. **Fork the Repository**: Start by forking the repository to a personal/organization GitHub account.
+2. **Clone the Repository**: Clone the forked repository to your local machine.
+3. **Set Up the Environment**: Set up a virtual environment and install the necessary 
+    dependencies for development and testing.
+    ```shell
+    $ python -m venv .venv
+    $ source .venv/bin/activate
+    $ pip install -r requirements.txt
+    ```
+4. **Install the pre-commit hooks**: We use [pre-commit](https://pre-commit.com/) to ensure code quality. 
+    Install the pre-commit hooks by running:
+    ```shell
+    $ pre-commit install
+    ```
+5. **Create a Branch**: Create a new branch for the feature or bug fix.
+6. **Make Changes**: Make the changes and ensure they are well-documented.
+7. **Run Tests**: Ensure all tests pass before submitting a pull request.
+    ```shell
+    $ pip install coverage pytest
+    $ coverage3 run --source='./encrypted_fields' manage.py test
+    ```
+8. **Submit Pull Request**: Submit a pull request with a clear title, description of the changes, 
+    motivations, and any relevant issue numbers.
+

README.md

@@ -90,3 +90,8 @@ They have the same APIs as their non-encrypted counterparts.
 | `5.1`                     | :heavy_check_mark:  | 3.10+                   |
 | `5.2`                     | :heavy_check_mark:  | 3.10+                   |
 | `6.0`                     | :heavy_check_mark:  | 3.12+                   |
+
+
+### Contributing
+
+See [CONTRIBUTING.md](CONTRIBUTING.md) for details on how to contribute to this project.