Create nodejs workflow (#555)
Create nodejs workflow (#555)

Summary:
A very basic first workflow that we can extend to match what we currently have in Travis and hopefully remove that in the near future.
Pull Request resolved: https://github.com/facebook/flipper/pull/555

Test Plan: https://github.com/facebook/flipper/pull/555/checks?check_run_id=232330215

Reviewed By: danielbuechele

Differential Revision: D17525516

Pulled By: passy

fbshipit-source-id: c1ebc1af2260482cfa97faae99f3baa5d5b9046c

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