Hello world in SpaceJS

[albertolluch]

Hi @simoneantenore @michele-loreti

Would it be possible to create a Hello World example as we have done for the rest of the languages? See:

https://github.com/pSpaces/Programming-with-Spaces/blob/master/hello.md

[albertolluch]

Sorry, I mentioned @fede-Raider but I meant @simoneantenore.