Dockerfile

FROM node:22-alpine AS builder

WORKDIR /app

# Install dependencies first (layer cache)
COPY package.json package-lock.json .npmrc ./
RUN npm ci --prefer-offline --no-audit --no-fund

# Build the app
COPY . .
RUN npm run build \
    && cp -r .next/static .next/standalone/.next/static \
    && cp -r public .next/standalone/public

FROM node:22-alpine AS runner

WORKDIR /app

ENV NODE_ENV=production
ENV PORT=3000
ENV HOSTNAME=0.0.0.0

RUN addgroup --system --gid 1001 nodejs \
    && adduser --system --uid 1001 nextjs

# Copy only the standalone output + static assets + public
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone/.next/static ./.next/static
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone/public ./public

USER nextjs

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:3000/ || exit 1

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