We can't see the Welcome page, because the response header is invalid.
HTTP/ 200 OK <-- here
Host: localhost:8000
Connection: close
X-Powered-By: PHP/7.0.4
Cache-control: no-store, max-age=0, no-cache
Content-type: text/html; charset=UTF-8
We should set protocolVersion somewhere, but I'm not sure where should be.