# Build Stage
FROM node:20-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci

# Copy source code
COPY . .

# Build Next.js project
RUN npm run build

# Production Stage
FROM node:20-alpine

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install production dependencies only
RUN npm ci --production

# Copy built Next.js app
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public

# Expose port
EXPOSE 4321

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node -e "require('http').get('http://localhost:4321', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

# Start Next.js server
CMD ["node", "server.js"]