Mesh networking tester for Swarm Mode

SwarmModeNetworking.md

Here's a quick tester for Swarm Mode that will work everywhere..

$ docker service create --name nginx1 -p 80:80 --mode=global --mount source=/etc/hostname,target=/usr/share/nginx/html/index.html,type=bind,ro nginx

You effectively bind mount the hostname as the index.html page meaning you can see the round-robin / mesh networking in action.