[cli] Add test for gatsby cache (#4447)
[cli] Add test for gatsby cache (#4447)

This PR adds a E2E CLI test to ensure that the Gatsby example deploys correctly and that the second deployment has the proper cached directories.

Co-authored-by: Nathan Rajlich <d1854cae891ec7b29161ccaf79a24b00c274bdaa@n8.io>
Co-authored-by: Andy <0d15e2bbbbb8c3b54449b07fff530caefa1b2e13@users.noreply.github.com>
zeit/now-cli,zeit/now-cli,zeit/now-cli,zeit/now-cli,zeit/now-cli,zeit/now-cli,zeit/now-cli