Offline: persist Soapbox config (eg frontend_configurations or soapbox.json)

app/soapbox/utils/instance.js

@@ -0,0 +1,11 @@
+export const getHost = instance => {
+  try {
+    return new URL(instance.get('uri')).host;
+  } catch {
+    try {
+      return new URL(`https://${instance.get('uri')}`).host;
+    } catch {
+      return null;
+    }
+  }
+};