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frontend/Dockerfile

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+# Build stage
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# 构建参数（NEXT_PUBLIC_* 变量需要在构建时注入）
+ARG NEXT_PUBLIC_API_URL
+ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci
+
+# Copy source code
+COPY . .
+
+# Build Next.js app
+RUN npm run build
+
+# Production stage
+FROM node:20-alpine AS runner
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+
+# Create non-root user
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+# Copy necessary files from builder
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/.next/standalone ./
+COPY --from=builder /app/.next/static ./.next/static
+
+USER nextjs
+
+EXPOSE 3000
+
+ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
+
+CMD ["node", "server.js"]