Dockerfile

# syntax=docker/dockerfile:1.7

# 1) Install production-ready dependencies cache
FROM node:26-alpine AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci

# 2) Build the Next.js standalone bundle
FROM node:26-alpine AS builder
WORKDIR /app
ENV NEXT_TELEMETRY_DISABLED=1
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build

# 3) Minimal runtime image
FROM node:26-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production \
    NEXT_TELEMETRY_DISABLED=1 \
    PORT=3000 \
    HOSTNAME=0.0.0.0

# Non-root user already exists in node:alpine as "node"
RUN apk add --no-cache wget

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

USER node

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
  CMD wget -qO- http://127.0.0.1:3000/ >/dev/null || exit 1

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