dockerfile.example

# Category: Prod
# Service: Docker NodeJS Production Dockerfile
# Description: Production-ready Dockerfile for building and serving the Next.js application.
# Maintainer: ryumada
FROM node:${DOCKER_NODEJS_TAG} AS builder

USER node

WORKDIR /usr/src/app

# Hardening: Set production environment and disable Next.js telemetry
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

COPY --chown=node:node app/${APP_NAME}/package.json app/${APP_NAME}/package-lock.json ./
RUN npm ci

COPY --chown=node:node app/${APP_NAME} ./

RUN npm run build

# STAGE 2: Serve the Next.js application with a production-ready environment
FROM node:${DOCKER_NODEJS_TAG} AS runner

USER node

WORKDIR /usr/src/app

# Hardening: Set production environment and disable Next.js telemetry
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

# Copy only necessary files from the builder stage
COPY --from=builder --chown=node:node /usr/src/app/.next ./.next
COPY --from=builder --chown=node:node /usr/src/app/node_modules ./node_modules
COPY --from=builder --chown=node:node /usr/src/app/public ./public
COPY --from=builder --chown=node:node /usr/src/app/package.json ./package.json
COPY --from=builder --chown=node:node /usr/src/app/next.config.mjs ./next.config.mjs

EXPOSE 3000

# Start the application directly to ensure OS signals are passed for graceful shutdowns
CMD ["./node_modules/.bin/next", "start"]