Fix logging in to docker when using default host

Author: zodern

src/plugins/meteor/prepare-bundle.js

@@ -79,7 +79,13 @@ export async function prepareBundleLocally(
   console.log('=> Updating base image');
   await runCommand(
     'docker',
-    ['login', '--username', privateDockerRegistry.username, '--password', privateDockerRegistry.password, privateDockerRegistry.host]
+    [
+      'login',
+      '--username',
+      privateDockerRegistry.username,
+      '--password',
+      privateDockerRegistry.password
+    ].concat(privateDockerRegistry.host ? [privateDockerRegistry.host] : [])
   );
   await runCommand('docker', ['pull', appConfig.docker.image]);