feat: add comprehensive documentation including user guide, API reference, and deployment instructions

CONTRIBUTING.md

@@ -0,0 +1,80 @@
+# Contributing to DocuNova
+
+Thank you for your interest in contributing to DocuNova! This document provides guidelines and instructions for contributing to the project.
+
+## Code of Conduct
+
+By participating in this project, you agree to abide by the [Code of Conduct](CODE_OF_CONDUCT.md).
+
+## How to Contribute
+
+### Reporting Bugs
+
+If you find a bug in the codebase, please submit an issue on GitHub with:
+
+1. A clear title and description
+2. Steps to reproduce the issue
+3. Expected behavior
+4. Actual behavior
+5. Environment information (OS, Docker version, etc.)
+
+### Feature Requests
+
+We welcome feature requests! Please submit an issue with:
+
+1. A clear title and description
+2. The problem the feature would solve
+3. Any ideas you have for implementing the feature
+
+### Pull Requests
+
+1. Fork the repository
+2. Create a new branch for your changes
+3. Make your changes
+4. Run the tests to ensure everything works
+5. Submit a pull request with a clear description of the changes
+
+## Development Environment
+
+### Setting Up Your Environment
+
+```bash
+# Clone the repository
+git clone https://github.com/christianlouis/document-processor.git
+cd document-processor
+
+# Create a virtual environment
+python -m venv venv
+source venv/bin/activate  # On Windows: venv\Scripts\activate
+
+# Install dependencies
+pip install -r requirements.txt
+pip install -r requirements-dev.txt
+```
+
+### Running Tests
+
+```bash
+pytest
+```
+
+### Code Style
+
+We use:
+- Black for Python code formatting
+- Flake8 for linting
+- isort for import sorting
+
+```bash
+# Format code
+black .
+
+# Check linting
+flake8
+
+# Sort imports
+isort .
+```
+
+## Project Structure
+