# Production-ready Dockerfile for Next.js
FROM node:20-alpine AS base
WORKDIR /app
ENV NODE_ENV=production

# Install dependencies only, then copy source for better caching
COPY package.json package-lock.json* ./
RUN npm ci --omit=dev

# Copy all files and build the Next.js app
COPY . .
RUN npm run build

# Use a non-root user for security
RUN addgroup -g 1001 -S nodejs && adduser -S nextjs -u 1001
USER nextjs

EXPOSE 3000
CMD ["npm", "start"]