Add section on running server and agent on same node

content/rancher/v2.x/en/installation/single-node-install/_index.md

@@ -185,3 +185,20 @@ You have a couple of options:
 ## Persistent Data
 
 {{< persistentdata >}}
+
+## Running `rancher/rancher` and `rancher/rancher-agent` on the same node
+
+In the situation where you want to use a single node to run Rancher and to be able to add the same node to a cluster, you have to adjust the host ports mapped for the `rancher/rancher` container.
+
+If a node is added to a cluster, it deploys the nginx ingress controller which will use port 80 and 443. This will conflict with the default ports we advice to expose for the `rancher/rancher` container. 
+
+Please note that this setup is not recommended for production use, but can be convenient for development/demo purposes.
+
+To change the host ports mapping, replace the following part `-p 80:80 -p 443:443` with `-p 8080:80 -p 8443:443`:
+
+```
+docker run -d --restart=unless-stopped \
+  -p 8080:80 -p 8443:443 \
+  rancher/rancher:latest
+```
+