Added docker repos url

README.md

@@ -14,12 +14,12 @@ The main reasons are:
 This gateway simply forwards Z2M events to xAAL bus and vice versa through MQTT.
 You can now use Z2M without messing with MQTT. Simply run this gateway, Z2M and
 a broker in a docker container. And you can use your Zigbee devices with xAAL.
-A docker-compose file is provided to run all services in this gitlab repository:
-<https://gitlab.imt-atlantique.fr/xaal/code/go/docker>
 
 ## Installation
 
-TBD
+The easier (and secure) way to use the gateway is to run it in a docker container.
+A docker-compose file is provided to run all services in
+[the gitlab repository](https://gitlab.imt-atlantique.fr/xaal/code/go/docker).
 
 ## FAQ