examples/getting-started:  add bind mount for docker socket to docker-compose.yml
examples/getting-started:  add bind mount for docker socket to docker-compose.yml

The cilium-docker plugin needs access to the docker socket, thus a bind
mount is needed.

Fixes #10962

Signed-off-by: Tobias Klauser <9249c549618448e4c699e8032ba6c7f0d7fd4b7f@distanz.ch>

tklauser/cilium,michi-covalent/cilium,michi-covalent/cilium,tgraf/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,cilium-team/cilium,cilium/cilium,tgraf/cilium,michi-covalent/cilium,cilium/cilium,cilium-team/cilium,tklauser/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,tklauser/cilium,tgraf/cilium,tklauser/cilium,cilium/cilium,cilium/cilium