Dockerfile

# Install dependencies only when needed
FROM node:18-buster-slim AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci

# Rebuild the source code only when needed
FROM node:18-buster-slim AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build

# Production image, copy all the files and run nexto
FROM node:18-alpine AS runner
WORKDIR /app

ENV NODE_ENV production

RUN addgroup -g 1001 -S nodejs
RUN adduser -S nextjs -u 1001

COPY --from=builder /app/next.config.js ./
COPY --from=builder /app/public ./public
COPY --from=builder /app/package.json ./package.json
COPY --from=builder /app/run.sh ./

# Automatically leverage output traces to reduce image size
# https://nextjs.org/docs/advanced-features/output-file-tracing
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

# SignalR 3.1 imports request in a non-standard way that Next doesn't recognize, so manually install it
RUN npm install request

USER nextjs
EXPOSE 3000
ENV PORT 3000

# Next.js collects completely anonymous telemetry data about general usage.
# Learn more here: https://nextjs.org/telemetry
# Uncomment the following line in case you want to disable telemetry.
ENV NEXT_TELEMETRY_DISABLED 1

ENTRYPOINT ["./run.sh"]