tweak the prose a little

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>

docs/sources/articles/host_integration.md

@@ -69,17 +69,18 @@ a new service that will be started after the docker daemon service has started.
     [Service]
     Restart=always
     ExecStart=/usr/bin/docker start -a redis_server
-    # for more options, use 'run' instead of 'start', but not suggested
-    # ExecStart=/usr/bin/docker run redis_server
     ExecStop=/usr/bin/docker stop -t 2 redis_server
 
     [Install]
     WantedBy=local.target
 
-if you need to pass options to the redis container (such as '--env'), 
-then you'll need to use 'docker run' rather than 'docker start'.
+If you need to pass options to the redis container (such as `--env`),
+then you'll need to use `docker run` rather than `docker start`. This will
+create a new container every time the service is started, which will be stopped
+and removed when the service is stopped.
 
     [Service]
     ...
-    ExecStart=/usr/bin/docker run --env foo=bar redis_server
+    ExecStart=/usr/bin/docker run --env foo=bar --name redis_server redis
+    ExecStop=/usr/bin/docker stop -t 2 redis_server ; /usr/bin/docker rm -f redis_server
     ...