feat: add Playwright + Chromium to Dockerfile for PDF generation

- Install system dependencies for headless Chromium
- Install Playwright Chromium browser during build
- Copy CSS source files for the HTML renderer
- Add ENABLE_PDF=true environment variable
- Install fonts for proper text rendering

Made-with: Cursor

Dockerfile

@@ -8,16 +8,48 @@ RUN npm run build
 
 FROM node:20-slim
 
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libglib2.0-0 \
+    libnss3 \
+    libnspr4 \
+    libatk1.0-0 \
+    libatk-bridge2.0-0 \
+    libcups2 \
+    libdrm2 \
+    libdbus-1-3 \
+    libxkbcommon0 \
+    libatspi2.0-0 \
+    libxcomposite1 \
+    libxdamage1 \
+    libxfixes3 \
+    libxrandr2 \
+    libgbm1 \
+    libpango-1.0-0 \
+    libcairo2 \
+    libasound2 \
+    libwayland-client0 \
+    fonts-noto-color-emoji \
+    fonts-liberation \
+    && rm -rf /var/lib/apt/lists/*
+
 WORKDIR /app
 COPY backend/package.json backend/package-lock.json* ./
 RUN npm install --omit=dev
+
+# Install Playwright Chromium (optional, controlled by ENABLE_PDF)
+RUN npx playwright install chromium || echo "Playwright install skipped"
+
 COPY backend/ ./
 RUN npx tsc
 
 COPY --from=frontend-build /app/frontend/dist ./frontend-dist
 
+# Copy CSS source files for the HTML renderer
+COPY frontend/src/styles/ ./frontend-styles/
+
 ENV PORT=8080
 ENV NODE_ENV=production
+ENV ENABLE_PDF=true
 EXPOSE 8080
 
 CMD ["node", "dist/server.js"]