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Dockerfile

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+# Node 20（Debian bookworm），与 @napi-rs/canvas 等原生模块兼容较好
+FROM node:20-bookworm-slim
+
+WORKDIR /app
+
+# 若 canvas 等依赖在部分环境下需编译，可取消下一行注释
+# RUN apt-get update && apt-get install -y --no-install-recommends python3 make g++ && rm -rf /var/lib/apt/lists/*
+
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev
+
+COPY . .
+
+ENV NODE_ENV=production
+EXPOSE 3000
+
+USER node
+
+CMD ["node", "src/server.js"]