cd $(mktemp -d)
npm init -y
npm install @vercel/ncc
echo 'console.log("Hello world!")' > index.js

cat > Dockerfile <<'EOT'
ARG ALPINE_VERSION=3.23

FROM node:24-alpine${ALPINE_VERSION} AS builder
WORKDIR /build-stage
COPY package*.json ./
RUN npm ci
# Copy the the files you need
COPY . ./
RUN npm run build

FROM alpine:${ALPINE_VERSION}
# Create app directory
WORKDIR /usr/src/app
# Add required binaries
RUN apk add --no-cache libstdc++ dumb-init \
  && addgroup -g 1000 node && adduser -u 1000 -G node -s /bin/sh -D node \
  && chown node:node ./
COPY --from=builder /usr/local/bin/node /usr/local/bin/
COPY --from=builder /usr/local/bin/docker-entrypoint.sh /usr/local/bin/
ENTRYPOINT ["docker-entrypoint.sh"]
USER node
# Update the following COPY lines based on your codebase
COPY --from=builder /build-stage/node_modules ./node_modules
COPY --from=builder /build-stage/dist ./dist
# Run with dumb-init to not start node with PID=1, since Node.js was not designed to run as PID 1
CMD ["dumb-init", "node", "dist/index.js"]
EOT

docker build -t test-small-image .
docker run --rm test-small-image
docker run --rm --entrypoint node test-small-image --version
docker run --rm --entrypoint which test-small-image node
docker run --rm --entrypoint which test-small-image npm
docker run --rm --entrypoint which test-small-image yarn