Cache npm packages in Docker GitHub actions

Question

I actually have GitHub actions that tests a nodeJS project in a Docker image ( node:16-alpine ). My problem is that at each run, yarn install re-installed completely all the packages. My question is: how can I cache these packages between runs?

I've trouble doing it since the execution run in the Docker image and I could not find a solution to cache the packages. Thank you for your help!

Answer 1

You can use github actions cache to cache things inside your job.

If you're using a docker image separately from your job, probably you can't cache that. My suggestion, improve your workflow if you create a job for a test and need the same environment put it all in just one job with different steps .