Error: unable to get local issuer certificate while running yarn command

in Nodejs command prompt run the following command. then everything works. its bcos of running behind a proxy error

yarn config set "strict-ssl" false -g

Realised that config needs to get into .yarnrc file. I have set following to get it worked.

cafile null
strict-ssl false

Also please note that yarn also takes config options from .npmrc file as well.