使用多阶段构建，Docker 层缓存管理 npm install

Dockerfile

@@ -1,10 +1,19 @@
+# --- 构建阶段 ---
+FROM node:20-alpine AS builder
+WORKDIR /app
+
+# 先复制依赖描述文件，利用层缓存
+COPY package.json package-lock.json ./
+RUN npm install
+
+# 再复制源码，构建
+COPY . .
+RUN npm run type-check && npm run build
+
+# --- 生产阶段 ---
 FROM nginx:alpine
-
-# 安装 curl 用于健康检查
 RUN apk add --no-cache curl
-
-COPY dist/ /usr/share/nginx/html/
+COPY --from=builder /app/dist/ /usr/share/nginx/html/
 RUN chmod -R 755 /usr/share/nginx/html
 COPY nginx.conf /etc/nginx/conf.d/default.conf
-
 EXPOSE 80