# 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_BASE
ENV NEXT_PUBLIC_API_BASE=${NEXT_PUBLIC_API_BASE}

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci

# Copy source code
COPY . .

# Ensure public directory exists
RUN mkdir -p public

# 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"]