test: expand test coverage

src/main.ts

@@ -82,6 +82,7 @@ Please expose a port if the container should be accessible by NGINX.`);
 
   // Docker Swarm network
   if (
+    /* istanbul ignore next */
     typeof container.NetworkSettings?.Networks?.ingress?.IPAddress !== 'undefined' &&
     typeof container.Ports[0].PrivatePort !== 'undefined'
   ) {