Add custom domains (#314)

app/javascript/interfaces/ITenant.ts

@@ -3,6 +3,7 @@ interface ITenant {
   siteName: string;
   siteLogo: string;
   locale: string;
+  customDomain?: string;
 }
 
 export default ITenant;

app/javascript/interfaces/json/ITenant.ts

@@ -4,6 +4,7 @@ interface ITenantJSON {
   site_logo: string;
   brand_display_setting: string;
   locale: string;
+  custom_domain?: string;
 }
 
 export default ITenantJSON;