Added note about upgrading docker-ce

README.md

@@ -24,6 +24,24 @@ export SERVERNAME="community.coops.tech"
 ansible-playbook -u root discourse_upgrade.yml -i "${SERVERNAME}," -e "hostname=${SERVERNAME}"
 ```
 
+## Docker Upgrade
+
+Every 3 months there is a new version of `docker-ce` released, the steps to upgrade (this could potentially be written as a Ansible Playbook:
+
+```bash
+sudo -i
+su - discourse
+cd /var/discourse
+./launcher app stop
+exit
+apt-get update
+apt-get upgrade
+service docker status # check the uptime and that it is running
+su - discourse
+cd /var/discourse
+./launcher app start
+```
+ 
 ## Discourse Install
 
 Ansible Playbooks to install