Cleans up .gitignore file.
Cleans up .gitignore file.

ctrlplusb/react-universally,ueno-llc/starter-kit-universally,sergiokopplin/react-universally,diondirza/react-universally,ueno-llc/starter-kit-universally,brettsnaidero/bsd,oyeanuj/react-universally,deanslamajr/trakta.co,pebie/react-universally-node-config,kennethtruong/react-webapp,LorbusChris/react-universally,igorsvee/react-ssr