Update index.js
Update index.js

FABLE_SERVER_PORT is passed in as a string. Update port to parse as an Int if it exists.
ncave/Fable,fable-compiler/Fable,fable-compiler/Fable,ncave/Fable,fable-compiler/Fable,ncave/Fable,inosik/Fable,fable-compiler/Fable,ncave/Fable,ncave/Fable,ncave/Fable,fable-compiler/Fable,inosik/Fable,fable-compiler/Fable,ncave/Fable,fable-compiler/Fable