Prominent hello world example not up to date #887

The hello world example on the index page is not up to date:
https://cpp-netlib.org/0.13.0/index.html#hello-world

Instead the page should reference the updated version found here:
https://cpp-netlib.org/0.13.0/examples/http/hello_world_server.html

By the way, is there a way to use stock_replies with the new connection_ptr signature?