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JUNAID ALI KHAN c776c25b59 docs(docker): update base image to node:20-alpine in Docker examples (#83125)
This PR updates all example Dockerfiles that were using `node:18-alpine`
to `node:20-alpine`
to align with current LTS and address known issues in Node 18 images.

- examples/with-docker/Dockerfile
- examples/with-docker-compose/next-app/prod.Dockerfile
- examples/with-docker-compose/next-app/dev.Dockerfile
- examples/with-docker-multi-env/docker/development/Dockerfile
- examples/with-docker-multi-env/docker/production/Dockerfile
- examples/with-docker-multi-env/docker/staging/Dockerfile

I verified local builds for each example. No behavior changes;
docs/examples only.


https://github.com/vercel/next.js/issues/78465

---------

Co-authored-by: Joseph <joseph.chamochumbi@vercel.com>
2025-09-02 19:06:42 +02:00

35 lines
1.2 KiB
Docker

# syntax=docker.io/docker/dockerfile:1
FROM node:20-alpine
WORKDIR /app
# Install dependencies based on the preferred package manager
COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* .npmrc* ./
RUN \
if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
elif [ -f package-lock.json ]; then npm ci; \
elif [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm i; \
# Allow install without lockfile, so example works even without Node.js installed locally
else echo "Warning: Lockfile not found. It is recommended to commit lockfiles to version control." && yarn install; \
fi
COPY src ./src
COPY public ./public
COPY next.config.js .
COPY tsconfig.json .
# Next.js collects completely anonymous telemetry data about general usage. Learn more here: https://nextjs.org/telemetry
# Uncomment the following line to disable telemetry at run time
# ENV NEXT_TELEMETRY_DISABLED 1
# Note: Don't expose ports here, Compose will handle that for us
# Start Next.js in development mode based on the preferred package manager
CMD \
if [ -f yarn.lock ]; then yarn dev; \
elif [ -f package-lock.json ]; then npm run dev; \
elif [ -f pnpm-lock.yaml ]; then pnpm dev; \
else npm run dev; \
fi