Update to mention the MapServer Homepage

Author: geographika

workshop/content/docs/setup.md

@@ -147,13 +147,10 @@ docker compose down
 ```
 
 Once the containers are downloaded you can test they are running and you can connect to them. Open a web browser
-and navigate to <http://localhost:7000/>. You should see the following message:
+and navigate to <http://localhost:7000/>, and you should see the "MapServer Homepage" which means MapServer
+is running correctly.
 
-```bash
-loadParams(): Web application error. No query information to decode. QUERY_STRING is set, but empty.
-```
-
-This is good! It means MapServer is running. Next we can check that the front-end container is running by opening <http://localhost:7001/points.html>.
+Next we can check that the front-end container is running by opening <http://localhost:7001/points.html>.
 Hopefully you'll see a map, and we're ready to start the workshop.
 
 ## Possible Errors