Dockerfile

# https://nextjs.org/docs/deployment#docker-image

# Install dependencies only when needed
FROM node:20-alpine AS deps
# Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
RUN apk add --no-cache libc6-compat
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci

# Rebuild the source code only when needed
FROM node:20-alpine AS builder
WORKDIR /app
COPY . .
COPY --from=deps /app/node_modules ./node_modules

# Hardcode base path at build time...
# ToDo: This is an ugly reality of having to hardcode the basePath for any SPAs at BUILD time (cannot be handled at runtime).
# Note: ARG allows overriding the value at docker image build time via "--build-arg APP_BASE_PATH=/oauth-examples"
ARG APP_BASE_PATH
# Also store the value as an environment variable inside the built image
ENV APP_BASE_PATH=${APP_BASE_PATH}

# 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 during the build.
ENV NEXT_TELEMETRY_DISABLED=1

RUN npm run build

# Production image, copy all the files and run next
FROM node:20-alpine AS runner
WORKDIR /app

# Uncomment the following line in case you want to disable telemetry during runtime.
ENV NEXT_TELEMETRY_DISABLED=1

# You only need to copy next.config.js if you are NOT using the default configuration
COPY --from=builder /app/next.config.js ./
COPY --from=builder /app/public ./public
COPY --from=builder /app/.next ./.next
COPY --from=builder /app/node_modules ./node_modules

RUN addgroup -g 1001 -S nodejs
RUN adduser -S nextjs -u 1001
RUN chown -R nextjs:nodejs /app/.next

USER nextjs

EXPOSE 3000

ENV PORT=3000

# Assume https protocol by default
ENV PROTOCOL="https"

CMD ["node_modules/.bin/next", "start"]