Document correct default behavior for HOST var (#7823)
Document correct default behavior for HOST var (#7823)


jdcrensh/create-react-app,Timer/create-react-app,d3ce1t/create-react-app,facebookincubator/create-react-app,facebookincubator/create-react-app,jdcrensh/create-react-app,d3ce1t/create-react-app,Timer/create-react-app,jdcrensh/create-react-app,Timer/create-react-app,Timer/create-react-app,d3ce1t/create-react-app,facebookincubator/create-react-app,jdcrensh/create-react-app,d3ce1t/create-react-app