Add multi-stage Dockerfile for Geo-Analytics API

Dockerfile

@@ -0,0 +1,45 @@
+# Multi-stage Dockerfile for Geo-Analytics API
+FROM python:3.11-slim as builder
+
+WORKDIR /app
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements and install dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir --user -r requirements.txt
+
+# Production stage
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Create non-root user
+RUN useradd -m -u 1000 appuser && chown -R appuser:appuser /app
+
+# Copy Python dependencies from builder
+COPY --from=builder --chown=appuser:appuser /root/.local /home/appuser/.local
+
+# Copy application code
+COPY --chown=appuser:appuser . .
+
+# Set environment variables
+ENV PATH=/home/appuser/.local/bin:$PATH \
+    PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1
+
+# Switch to non-root user
+USER appuser
+
+# Expose port
+EXPOSE 8000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD python -c "import requests; requests.get('http://localhost:8000/health', timeout=2)" || exit 1
+
+# Run application
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]