Docker build is taking too much time?

Question

This is the dockerfile:

FROM node:16

WORKDIR /app

COPY package.json .

RUN npm install

COPY . ./

EXPOSE 5000

CMD ["npm","run","dev"]

Every time I run the build command , it downloads from node image as instructed at first line.But I thought I was cached to make the image building faster. The total time it takes is like 600+ seconds. Is there a way to make the build proccess faster?

Answer 1

You have to set a tag. Otherwise docker can't know where it can find the related cache.

docker build -t yourImageName:yourTag .

See also this for more informations