Add contributing doc

CONTRIBUTING.md

@@ -0,0 +1,29 @@
+# Contribution Guide
+
+This guide will help you get set up on contributing to the netrunner comprehensive rules project.
+
+## Overview
+
+Overview of the folder structure in the project:
+
+```
+- .github             | files for github actions
+- data                | input data for the document generation 
+- rules_doc_generator | python project for the format conversion
+```
+
+## Setup
+
+To get set up with the Python project you'll need at least Python 3.11 and install the required dependencies.
+
+```
+pip install -r requirements.txt
+```
+
+After that you can generate the output documents via the python module.
+
+```
+python -m rules_doc_generator
+```
+
+This will generate an output folder corresponding to each of the output formats (currently: `html` and `latex`). When making changes and pushing them to the repository, you should verify that the output can be generated and looks like you expect.