Update README.md

README.md

@@ -66,10 +66,10 @@ docker run -it lukechilds/dockerpi pi3
 
 In some applications you may want to have access to some ports of the Raspberry Pi (e.g. for SSH connection). To do so, you can set the `QEMU_HOSTFWD` enviroment variable of the container by adding one or more entries, separated by spaces, in the standard QEMU format (`protocol::hostip:hostport-guestip:guestport`).
 
-Example using the `docker run` command to expose the SSH port from the Raspberry Pi to the Container (`-e` part) and from the Container to the Host (`-p` part):
+Example using the `docker run` command to expose the SSH and MQTT ports from the Raspberry Pi to the Container (`-e` part) and from the Container to the Host (`-p` part):
 
 ```
-docker run -it -e QEMU_HOSTFWD=tcp::5022-:22 -p 5022:5022 lukechilds/dockerpi
+docker run -it -e QEMU_HOSTFWD="tcp::5022-:22 tcp::1883-:1883" -p 5022:5022 -p 1883:1883 lukechilds/dockerpi
 ```
 
 Example using the `docker-compose.yml` file to achieve the same result:
@@ -79,9 +79,10 @@ services:
   dockerpi:
     image: lukechilds/dockerpi
     environment:
-     - QEMU_HOSTFWD=tcp::5022-:22
+     - QEMU_HOSTFWD=tcp::5022-:22 tcp::1883-:1883
     ports:
      - "5022:5022"
+     - "1883:1883"
 ```
 
 ## Wait, what?