I was exploring the CI workflow as part of my university project on GitHub Actions and noticed that the setup-node step doesn't currently include dependency caching.

The current setup-node step looks like this:

• uses: actions/setup-node@6044e13 # v6.2.0
  with:
  node-version: 'lts/*'

Adding cache: 'npm' would allow GitHub Actions to cache node_modules between runs, which can reduce install time on repeated builds:

• uses: actions/setup-node@6044e13 # v6.2.0
  with:
  node-version: 'lts/*'
  cache: 'npm'

I tested this on my own Node.js project and it worked without any other changes needed. I appreciate this may already be a considered decision, so happy to hear if there's a reason it's been left out.