Enhance ACR Build and Push Guide with update steps

Author: NirajC-Microsoft

docs/ACRBuildAndPushGuide.md

@@ -37,6 +37,21 @@ docker build --no-cache -f docker/Backend.Dockerfile -t <acrloginserver>/<repo>:
 docker push <acrloginserver>/<repo>:<tagname>
  ```
 
+ If you want to update image tag and image manually you can follow below steps:
+- Go to your **Container App** in the [Azure Portal](https://portal.azure.com/#home).
+- In the left menu, select **Containers**.
+- Under your container, update:
+
+    - Image source → Azure Container Registry / Docker Hub.
+
+    - Image name → myapp/backend.
+
+    - Tag → change to the new one you pushed (e.g., v2).
+
+- Click **Save** → this will create a new revision automatically with the updated image.
+
+![alt text](./images/ContainerApp.png)
+
 **WebApp :**
 
 ```bash
@@ -45,6 +60,20 @@ docker build --no-cache -f docker/Frontend.Dockerfile -t <acrloginserver>/<repo>
 docker push <acrloginserver>/<repo>:<tagname>
 ```
 
+If you want to update image tag and image manually you can follow below steps:
+- Go to your App Service in the [Azure Portal](https://portal.azure.com/#home).
+- In the left menu, select Deployment → Deployment Center
+- Under Container settings, you can configure:
+
+    - Image Source → (e.g., Azure Container Registry / Docker Hub / Other).
+
+    - Image Name → e.g., myapp/backend.
+
+    - Tag → e.g., v1.2.3.
+
+![alt text](./images/AppServiceContainer.png)
+
+
 ## ✅ Verification
 
 Run the following command to verify that images were pushed successfully: