Update deployment instructions for HD

Author: chatrtham

HD.MD

@@ -0,0 +1,21 @@
+# Deployment
+
+## Deploying the App
+
+To deploy the application using the Azure Developer CLI:
+
+1. Navigate to the root directory of the project.
+2. Run `azd deploy`.
+
+## Updating Environment Variables for Azure Container App
+
+To update environment variables for the Azure Container App, use the `az containerapp env update` command:
+
+1. Open terminal or command prompt.
+2. Run the following command, replacing placeholders with the actual values:
+
+   ```bash
+   az containerapp env update \
+       --name <container-app-name> \
+       --resource-group <resource-group-name> \
+       --set-env-vars "<key1>=<value1>" "<key2>=<value2>" ...