npm install in bitbucket pipeline vs docker

Question

My company is using bitbucket-pipeline alongside with docker to build an image of the application before deploying it.

When I'm reading into the docker file, I can see these lines:

(ignored a bunch of lines)
RUN yarn install
RUN yarn run my-script
COPY . .

and in pipeline, I see this script

docker build .

My question is, is there any reason why I should put RUN yarn install and RUN yarn run my-script into docker and not in pipeline?

My reasons behind putting it in pipeline is so you can utilise cache from bitbucket pipeline, as well as lower the size of the docker image (I understand that few layers means smaller image size).

Answer 1

I have seen both setup in various projects. yarn install within the docker environment would still be my preferred choice because of the separation of domain it provide. Imaging having a team of many people - setting up YARN install within docker developers don't have to worry about npm environment on their own machines. Ideally if you are utilising docker then local machine should not have anything but docker. Same goes for PIPELINE - if you ever decide to move away from bitbucket-pipeline - having everything contained within the docker environment you can just pack up and go.