Merge pull request #2157 from mnowster/2151-missing-port-range

Put port ranges back in

docs/yml.md

@@ -315,9 +315,12 @@ port (a random host port will be chosen).
 
     ports:
      - "3000"
+     - "3000-3005"
      - "8000:8000"
+     - "9090-9091:8080-8081"
      - "49100:22"
      - "127.0.0.1:8001:8001"
+     - "127.0.0.1:5000-5010:5000-5010"
 
 ### security_opt