Update container-instances-tutorial-deploy-app.md

The -ip-address is missing in the az container create command , causing the instance to run without an IP address.

Author: cventour

articles/container-instances/container-instances-tutorial-deploy-app.md

@@ -42,7 +42,7 @@ az acr show --name <acrName> --query loginServer
 Now, use the [az container create][az-container-create] command to deploy the container. Replace `<acrLoginServer>` with the value you obtained from the previous command. Replace `<service-principal-ID>` and `<service-principal-password>` with the service principal ID and password that you created to access the registry. Replace `<aciDnsLabel>` with a desired DNS name.
 
 ```azurecli
-az container create --resource-group myResourceGroup --name aci-tutorial-app --image <acrLoginServer>/aci-tutorial-app:v1 --cpu 1 --memory 1 --registry-login-server <acrLoginServer> --registry-username <service-principal-ID> --registry-password <service-principal-password> --dns-name-label <aciDnsLabel> --ports 80
+az container create --resource-group myResourceGroup --name aci-tutorial-app --image <acrLoginServer>/aci-tutorial-app:v1 --cpu 1 --memory 1 --registry-login-server <acrLoginServer> --registry-username <service-principal-ID> --registry-password <service-principal-password> --ip-address Public --dns-name-label <aciDnsLabel> --ports 80
 ```
 
 Within a few seconds, you should receive an initial response from Azure. The `--dns-name-label` value must be unique within the Azure region you create the container instance. Modify the value in the preceding command if you receive a **DNS name label** error message when you execute the command.