FROM node:20-alpine AS deps
WORKDIR /app
COPY package.json package-lock.json* ./
RUN if [ -f package-lock.json ]; then npm ci; else npm install; fi

FROM node:20-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build

FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production
ENV PORT=3000
ENV HOSTNAME=0.0.0.0
RUN addgroup -S nextjs && adduser -S nextjs -G nextjs

COPY --from=builder /app/public ./public
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

USER nextjs
EXPOSE 3000

CMD ["node", "server.js"]