Added "How to run DS on different port"

README.md

@@ -4,6 +4,7 @@
 * [Running Docker Image](#running-docker-image)
 * [Configuring Docker Image](#configuring-docker-image)
     - [Storing Data](#storing-data)
+    - [Running ONLYOFFICE Document Server on Different Port](#running-onlyoffice-document-server-on-different-port)
     - [Running ONLYOFFICE Document Server using HTTPS](#running-onlyoffice-document-server-using-https)
         + [Generation of Self Signed Certificates](#generation-of-self-signed-certificates)
         + [Strengthening the Server Security](#strengthening-the-server-security)
@@ -66,6 +67,12 @@ To get access to your data from outside the container, you need to mount the vol
 
 Storing the data on the host machine allows you to easily update ONLYOFFICE once the new version is released without losing your data.
 
+### Running ONLYOFFICE Document Server on Different Port
+
+To change the port, use the -p command. E.g.: to make your portal accessible via port 8080 execute the following command:
+
+    sudo docker run -i -t -d -p 8080:80 onlyoffice/documentserver
+
 ### Running ONLYOFFICE Document Server using HTTPS
 
         sudo docker run -i -t -d -p 443:443 \