# SvelteKit Web 前端 Dockerfile
# 多阶段构建：构建阶段 + 运行阶段

# ===== 构建阶段 =====
FROM node:20-alpine AS builder

WORKDIR /app

# 配置 yarn 镜像源（国内）
RUN yarn config set registry https://registry.npmmirror.com

# 先复制依赖文件，利用 Docker 缓存
COPY package.json yarn.lock* ./

# 安装依赖
RUN yarn install --frozen-lockfile || yarn install

# 复制源代码
COPY . .

# 构建生产版本
RUN yarn build

# ===== 运行阶段 =====
FROM node:20-alpine

WORKDIR /app

# 配置 Alpine 镜像源（国内）
RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories

# 安装必要工具
RUN apk --no-cache add curl

# 设置时区
ENV TZ=Asia/Shanghai

# 设置为生产环境
ENV NODE_ENV=production
ENV HOST=0.0.0.0
ENV PORT=3000

# 从构建阶段复制构建产物和依赖
COPY --from=builder /app/build ./build
COPY --from=builder /app/package.json ./
COPY --from=builder /app/node_modules ./node_modules

# 暴露端口
EXPOSE 3000

# 健康检查
HEALTHCHECK --interval=10s --timeout=5s --retries=5 \
    CMD curl -f http://localhost:3000 || exit 1

# 启动服务
CMD ["node", "build"]