Updated example with required RWA_PASSWORD

#8

README.md

@@ -11,7 +11,10 @@ can remain securely isolated within the Docker network.
 To get up and running quickly, use
 
 ```
-docker run -d -p 4326:4326 -p 4327:4327 itzg/rcon
+docker run -d --name rcon-web \
+  -p 4326:4326 -p 4327:4327 \
+  -e RWA_PASSWORD=password \
+  itzg/rcon
 ```
 
 With that you can follow the [regular instructions](https://github.com/rcon-web-admin/rcon-web-admin#visit-the-ui) and
@@ -23,6 +26,9 @@ access the web UI at http://YOUR_DOCKER_HOST:4326
 
 `RWA_ENV` is preset to "TRUE" in this image, so [all of the environment variables described in rcon-web-admin](https://github.com/rcon-web-admin/rcon-web-admin#environment-variables) are available for use.
 
+- `RWA_PASSWORD` : required to be set for the initial user (by default `admin`) password
+- `RWA_RCON_HOST` : should be set to the Minecraft server's hostname, such as the service name in a Docker Compose deployment 
+
 ### VOLUMEs
 
 * /opt/rcon-web-admin/db