# Multi-stage Dockerfile for Next.js app (production)
FROM node:20-alpine AS deps
WORKDIR /app

# Install dependencies
COPY package*.json ./
RUN if [ -f package-lock.json ]; then npm ci; else npm install; fi

# Build stage
FROM node:20-alpine AS builder
WORKDIR /app
ENV NEXT_TELEMETRY_DISABLED=1

COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build

# Runtime stage
FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1
ENV PORT=3001

# Install prod deps only for runtime
COPY package*.json ./
RUN if [ -f package-lock.json ]; then npm ci --omit=dev; else npm install --omit=dev; fi

# Copy build artifacts
COPY --from=builder /app/.next ./.next
COPY --from=builder /app/public ./public
COPY --from=builder /app/next.config.* ./

EXPOSE 3001
CMD ["npm", "start"]