microsoft
cache installed deps on CI
Is this any faster than letting pnpm install directly? I know for the main repo I support I abandoned dependency caching because it's faster to download and install the tarballs than the registry (though that is probably impacted by having a within-datacenter mirror).
I'm sorry for omitting the description block ... I didn't realize that this would open outside of my repo. It's obviously not ready for review yet.
@dmichon-msft the purpose of this PR is not for efficiency - it's for creating a documented reference for others to see. There was no clear place where I could conclusively find the best way to cache deps for rush, so I figured why not put it in the most authoritative place - the source code.