I'm pretty sure this is a joke. There's no way you can run a SaaS on two lines of code... Unless it's some bizzarely simple calculator or something like that.
Sibling comments aside (without comment on my part), it would be hard to have 6 years of production use of a language that has its first git commit 2 years ago.
"ACTUALLY! ..."
That'd actually be pretty helpful for initial prototyping, where you want to have state shared across devices but don't want to bother with hosting a backend at first, and localhost wont work because the client wants to play with it too.