This project is called hello_world. It defines one library called
hello_world and one executable called hello_world.
The library is defined in lib and the executable in bin. It also defines a
test in test.
At the toplevel of the project, there is a hello_world.opam file. This file
is required so that Dune knows that this is the hello_world project.
To build everything that is meant to be installed in this project, type:
$ dune build @install
To run the tests, type:
$ dune runtest