Add CONTRIBUTING.md

- Add requirements for debian hosts
- Add section that explains how to add new docs.

CONTRIBUTING.md

@@ -0,0 +1,17 @@
+# Contributing
+
+## Dependencies
+
+On Debian:
+
+```
+sudo apt install libpq-dev
+pip3 install -r requirements.txt
+pip3 install markdown django
+```
+
+## 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.