Update screenshots to match current Azure Container Registry (ACR) and also add minor edit on repository/image name format and more clarification.

Author: eriawan

articles/container-registry/container-registry-get-started-portal.md

@@ -66,29 +66,30 @@ To push an image to your Azure Container Registry, you must first have an image.
 docker pull microsoft/aci-helloworld
 ```
 
-Before you push the image to your registry, you must tag the image with the ACR login server name. Tag the image using the [docker tag][docker-tag] command. Replace *login server* with the login server name you recorded earlier.
+Before you push the image to your registry, you must tag the image with the ACR login server name. Tag the image using the [docker tag][docker-tag] command. Replace *login server* with the login server name you recorded earlier. Add a *repository name* to place your image in a repository.
 
 ```bash
-docker tag microsoft/aci-helloworld <login server>/aci-helloworld:v1
+docker tag microsoft/aci-helloworld <login server>/<repository name>/aci-helloworld:v1
 ```
 
 Finally, use [docker push][docker-push] to push the image to the ACR instance. Replace *login server* with the login server name of your ACR instance.
 
 ```bash
-docker push <login server>/aci-helloworld:v1
+docker push <login server>/<repository name>/aci-helloworld:v1
 ```
+In this example, let's use **`myrepo`** as the *<repository name>* for aci-helloworld image.
 
 Output from a successful `docker push` command is similar to:
 
 ```
-The push refers to a repository [uniqueregistryname.azurecr.io/aci-helloworld]
-7c701b1aeecd: Pushed
-c4332f071aa2: Pushed
-0607e25cc175: Pushed
+The push refers to repository [specificregistryname.azurecr.io/myrepo/aci-helloworld]
+31ba1ebd9cf5: Pushed
+cd07853fe8be: Pushed
+73f25249687f: Pushed
 d8fbd47558a8: Pushed
 44ab46125c35: Pushed
 5bef08742407: Pushed
-v1: digest: sha256:f2867748615cc327d31c68b1172cc03c0544432717c4d2ba2c1c2d34b18c62ba size: 1577
+v1: digest: sha256:565dba8ce20ca1a311c2d9485089d7ddc935dd50140510050345a1b0ea4ffa6e size: 1576
 ```
 
 ## List container images
@@ -109,7 +110,7 @@ A context menu will appear, select **Run instance**:
 
 ![Launch ACI context menu][qs-portal-11]
 
-Fill in **Container name**, ensure the correct subscription is selected, select the existing **Resource group**: "myResourceGroup" and then click **OK** to launch the Azure Container Instance.
+Fill in **Container name**, ensure the correct subscription is selected, select the existing **Resource group**: "myResourceGroup". Ensure that the "Public IP address" options is enabled by setting to **Yes** and then click **OK** to launch the Azure Container Instance.
 
 ![Launch ACI deployment options][qs-portal-12]