This is the most iconic exercise in coding history, we should include
this one. Your only task is to create a function hello:hello/0 that
returns the binary <<"hello world">> (don't worry about understanding binaries, yet). To test that is working correctly check it running make.
As a hint, the file you should be editing is src/hello.erl. But in any
case if the things get difficult you can check our
proposal solution.