add dockerfile for backend

backand/Dockerfile

@@ -0,0 +1,52 @@
+# ============================
+# Stage 1: Build dependencies
+# ============================
+FROM python:3.13-slim AS builder
+
+# Optimize Python
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+# Install build tools (if needed for wheels)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create app working directory
+WORKDIR /app
+
+# Install Python dependencies
+COPY requirements.txt .
+RUN pip install --upgrade pip
+RUN pip install --no-cache-dir -r requirements.txt
+
+# ============================
+# Stage 2: Production image
+# ============================
+FROM python:3.13-slim
+
+# Optimize Python
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+# Create non-root user
+RUN useradd -m -r appuser
+
+# Create working directory
+WORKDIR /app
+
+# Copy installed dependencies from builder
+COPY --from=builder /usr/local/lib/python3.13/site-packages/ /usr/local/lib/python3.13/site-packages/
+COPY --from=builder /usr/local/bin/ /usr/local/bin/
+
+# Copy application code with ownership
+COPY --chown=appuser:appuser . .
+
+# Switch to non-root user
+USER appuser
+
+# Expose Django port
+EXPOSE 8000
+
+# Run Django with uvicorn
+CMD ["uvicorn", "MPM:application", "--host", "0.0.0.0", "--port", "7080"]