add runtime server to portal

Author: markingmyname

articles/postgresql/migrate/migration-service/includes/single-server/postgresql-single-server-portal-migrate.md

@@ -82,6 +82,14 @@ If the **Online** migration is selected, Logical replication must be turned on i
 
 Select the **Next : Connect to Source** button.
 
+### Runtime Server
+
+The Migration Runtime Server is a specialized feature within the [migration service in Azure Database for PostgreSQL](concepts-migration-service-postgresql.md), designed to act as an intermediary server during migration. It's a separate Azure Database for PostgreSQL - Flexible Server instance that isn't the target server but is used to facilitate the migration of databases from a source environment that is only accessible via a private network.
+
+:::image type="content" source="../../media/tutorial-migration-service-single-to-flexible/02-portal-offline-runtime-server-migration-single-server.png" alt-text="Screenshot of the Migration Runtime Server page.":::
+
+For more information about the Runtime Server, visit the [Migration Runtime Server](concepts-migration-service-runtime-server.md).
+
 ### Connect to source
 
 The **Source** tab prompts you to give details related to the Single Server, which is the source of the databases.
@@ -253,6 +261,14 @@ If the **Online** migration is selected, Logical replication must be turned on i
 
 Select the **Next : Connect to Source** button.
 
+### Runtime Server
+
+The Migration Runtime Server is a specialized feature within the [migration service in Azure Database for PostgreSQL](concepts-migration-service-postgresql.md), designed to act as an intermediary server during migration. It's a separate Azure Database for PostgreSQL - Flexible Server instance that isn't the target server but is used to facilitate the migration of databases from a source environment that is only accessible via a private network.
+
+:::image type="content" source="../../media/tutorial-migration-service-single-to-flexible/02-portal-online-runtime-server-migration-single-server.png" alt-text="Screenshot of the Migration Runtime Server page.":::
+
+For more information about the Runtime Server, visit the [Migration Runtime Server](concepts-migration-service-runtime-server.md).
+
 ### Connect to source
 
 The **Source** tab prompts you to give details related to the Single Server, which is the source of the databases.