medium10 pts · first answer countsdockerperformance

Slow Docker builds after every change

Every small code change makes this build reinstall all npm packages. How do you fix it?

FROM node:22-alpine
WORKDIR /app
COPY . .
RUN npm ci
CMD ["node", "server.js"]

A.Copy package.json and the lockfile first, run npm ci, then copy the sourceB.Add --no-cache to docker build so every layer is always rebuilt freshC.Switch the base image to node:latest so installs run fasterD.Move RUN npm ci into a separate Dockerfile built on its own

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