# 1. 使用 Node.js 20 镜像
FROM node:20 AS builder
WORKDIR /app

# 2. 安装 pnpm (比 npm 更省内存，专门对付 254 报错)
RUN corepack enable && corepack prepare pnpm@latest --activate

# 3. 复制零件清单
COPY package*.json ./

# 4. 使用 pnpm 安装，增加缓存和重试
# --prod=false 确保开发依赖 (Vite) 也能装上
RUN pnpm install --no-frozen-lockfile

# 5. 复制源码
COPY . .

# 6. 注入 Secret
ARG VITE_GEMINI_API_KEY
ENV VITE_GEMINI_API_KEY=$VITE_GEMINI_API_KEY

# 7. 执行打包
RUN pnpm run build

# 8. 运行阶段
FROM node:20-slim
WORKDIR /app
RUN npm install -g serve
COPY --from=builder /app/dist ./dist

EXPOSE 7860
CMD ["serve", "-s", "dist", "-l", "7860"]