add little note about flag for when you use an ACR in tutorial

Signed-off-by: Hannah Hunter <[email protected]>

Author: hhunter-ms

articles/container-apps/microservices-dapr.md

@@ -262,6 +262,8 @@ az containerapp create \
   --env-vars 'APP_PORT=3000'
 ```
 
+If you're using an Azure Container Registry, include the `--registry-server .azurecr.io` flag in the command.
+
 # [Azure PowerShell](#tab/azure-powershell)
 
 ```azurepowershell-interactive
@@ -295,6 +297,8 @@ $ServiceArgs = @{
 New-AzContainerApp @ServiceArgs
 ```
 
+If you're using an Azure Container Registry, include the `RegistryServer = '.azurecr.io'` flag in the command.
+
 ---
 
 By default, the image is pulled from [Docker Hub](https://hub.docker.com/r/dapriosamples/hello-k8s-node).
@@ -317,6 +321,8 @@ az containerapp create \
   --dapr-app-id pythonapp
 ```
 
+If you're using an Azure Container Registry, include the `--registry-server .azurecr.io` flag in the command.
+
 # [Azure PowerShell](#tab/azure-powershell)
 
 ```azurepowershell-interactive
@@ -343,6 +349,8 @@ $ClientArgs = @{
 New-AzContainerApp @ClientArgs
 ```
 
+If you're using an Azure Container Registry, include the `RegistryServer = '.azurecr.io'` flag in the command.
+
 ---
 
 ## Verify the results