rapid interations of server side app and firefox extension

Dockerfile

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+# Stage 1: Build frontend
+FROM node:20-alpine AS frontend-build
+
+WORKDIR /frontend
+COPY frontend/package*.json ./
+RUN npm install
+COPY frontend/ .
+RUN npm run build
+
+# Stage 2: Python backend with frontend static files
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    libpq-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
+COPY backend/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy backend application
+COPY backend/ .
+
+# Copy built frontend from Stage 1
+COPY --from=frontend-build /frontend/dist /app/static
+
+# Create data directories
+RUN mkdir -p /data/downloads /data/config /data/cookies
+
+# Run as non-root user
+RUN useradd -m -u 1000 appuser && \
+    chown -R appuser:appuser /app /data
+USER appuser
+
+EXPOSE 8080
+
+CMD ["hypercorn", "app.main:app", "--bind", "0.0.0.0:8080"]