Add portainer/README.md

portainer/README.md

@@ -0,0 +1,13 @@
+### Start/stop stack:
+```bash
+docker stack deploy --compose-file=portainer-agent-stack-swarm.yml portainer
+docker stack rm portainer
+```
+
+### Update portainer images:
+```bash
+docker pull portainer/portainer-ce:latest
+docker pull portainer/agent:latest
+docker service update --force portainer_portainer
+docker service update --force portainer_agent
+```