feat(tests): Add comprehensive tests for Docker image export and streaming functionality

ts/classes.service.ts

@@ -89,6 +89,11 @@ export class DockerService {
     }> = [];
 
     for (const network of serviceCreationDescriptor.networks) {
+      // Skip null networks (can happen if network creation fails)
+      if (!network) {
+        logger.log('warn', 'Skipping null network in service creation');
+        continue;
+      }
       networkArray.push({
         Target: network.Name,
         Aliases: [serviceCreationDescriptor.networkAlias],