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+FROM node:22-slim
+
+# Install Chrome dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    chromium \
+    fonts-freefont-ttf \
+    fonts-noto-cjk \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev
+
+COPY md2html.js mermaid.min.js ./
+
+ENV CHROME_PATH=/usr/bin/chromium
+
+ENTRYPOINT ["node", "md2html.js"]