cache frontend builds

[cypressf]

actions/setup-node says the cache was restored, but the yarn cache is only 244 bytes, and doesn't seem to speed up the build time. why is this?

[cypressf]

This is sus: https://github.com/cypressf/climate-risk-map/runs/4958804935?check_suite_focus=true#step:3:13

/usr/local/bin/yarn --version
1.22.17

but on my dev machine

yarn --version
3.1.0

[cypressf]

in the runner

/usr/local/bin/yarn cache dir
/home/runner/.cache/yarn/v6

but on my dev machine, from frontend

yarn config get cacheFolder
.yarn/cache

[cypressf]

huh... when building the frontend it uses the correct version of yarn. in the builder (https://github.com/cypressf/climate-risk-map/runs/4959727715?check_suite_focus=true#step:4:11)

which yarn
/usr/local/bin/yarn
/usr/local/bin/yarn --version
3.1.0
yarn --version
3.1.0

[cypressf]

okay I've decided I'm sufficiently annoyed debugging. I'll build my own based on actions/setup-node#325