By default when you just run `tailwindcss` it will print the help
message. If you run `tailwindcss build` it will print to stdout, and
thus you can do `tailwindcss build > output.css`. However, we want just
`tailwindcss` to be able to compile as well. This means that:

- `tailwindcss` will print the help text
- `tailwindcss > output.css` will actually compile and write to the
  file.

This uses `cssnano`, and is also lazy loaded when you are passing the
`--minify` flag.

Copy & paste error!