Cache npm packages in Docker GitHub actions

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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!

npm github-actions docker node.js caching
1 Answers

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.

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