Add more content in CONTRIBUTING

CONTRIBUTING.md

@@ -1,17 +1,23 @@
 # Contributing
 
-## Dependencies
+I'm open to feature suggestions and happy to review code contributions.
+If you are planning to contribute something larger than a small, straightforward
+bugfix, please open an issue so we can discuss it first. Otherwise you are risking a 
+"no" or a "yes, but let's do it differently" to an already implemented feature.
 
-On Debian:
+## Code Style
 
-```
-sudo apt install libpq-dev
-pip3 install -r requirements.txt
-pip3 install markdown django
-```
+* Format your Python code with [black](https://black.readthedocs.io/en/stable/).
+* Prefer simplicity over cleverness.
+* If you are fixing a bug or adding a feature, add a test. Run tests before 
+  submitting pull requests.
 
 ## Adding Documentation
 
-1. Create the appropriate markdown page under `templates/docs`
-2. Add the page to `/templates/front/base_docs.html`
-3. Generate the HTML assets with `python3 manage.py render_docs` - note that the `manage.py` is in the root of the project.
+This project uses the Markdown format for documentation. Use the `render_docs` 
+management command to generate the HTML version of the documentation. To add a new
+documentation page:
+
+1. Create the appropriate .md file under `templates/docs`
+2. Generate the HTML version with `./manage.py render_docs` 
+3. Add the page to the navigation in `/templates/front/base_docs.html`