here is the screenshoot of my Dockerfile:

And this is my Docker image file:

why I getting large docker image using this Dockerfile command eventhough I have add the .dockerignore to ignore node modules, is there any way to solve this image size ? Can we use webpack to bundle and implement tree shaking and make the size smaller for prodction

CodePudding user response：

1. To reduce the docker image size, use the alpine tag. this tag uses Alpine Linux as a base image, and this will decrease your built image. (What is Alpine Linux? Alpine Linux is a security-oriented, lightweight Linux distribution based on musl, libc, and busybox.)

2. you can use multi-stage builds to build your docker image.

3. use npm prune --production, this command will remove the packages specified in your devDependencies.

A sample Dockerfile that follows the mentioned conditions:

FROM node:14-alpine as build

WORKDIR /opt/app

COPY . /opt/app

RUN npm ci \
    && npm run build \
    && npm prune --production


FROM node:14-alpine

ENV NODE_ENV=production

USER node
WORKDIR /opt/app

COPY --from=build /opt/app/package*.json /opt/app/
COPY --from=build /opt/app/node_modules/ /opt/app/node_modules/
COPY --from=build /opt/app/dist/ /opt/app/dist/

EXPOSE 3000

CMD ["npm", "run", "start:prod"]

CodePudding user response：

you can use alpine docker image like node:14.5.0-alpine

its recommended using alpine images as it's speed, secure, and lightweight