Initial commit: React + Django full-stack project setup

- Backend: Django 4.2 + DRF + JWT + GraphQL
- Frontend: React 18 + MobX + styled-components
- Deployment: Docker + Docker Compose + Nginx
- Database: PostgreSQL support
- Documentation: README, INIT, PROJECT_DOCS, TESTING

backend/Dockerfile

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+FROM python:3.11-slim
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+# Set work directory
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install \
+    gcc \
+    postgresql-client \
+    -y --no-install-recommends && \
+    rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy project
+COPY . .
+
+# Collect static files
+RUN python manage.py collectstatic --noinput --settings=config.settings.prod
+
+# Expose port
+EXPOSE 8000
+
+# Run gunicorn
+CMD ["gunicorn", "config.wsgi:application", "--bind", "0.0.0.0:8000", "--workers", "3"]