The original intent was that you input your information before going to a conference, and you have a "card-free" business card.
The benefit is also that you can create multiple "slugs" (the
example.com/slug), so if you have a particularly pushy recruiter,
you can give them a URL that only discloses what you would like.
How to setup
If you have Docker installed it's pretty simple:
docker run -P -d trtmn/hello
This will download the Docker image, start a new container based on that image, start nginx and open up port 80 in your Docker instance.