feat: add Master Admin application functionality

src/app/core/config/api-host.ts

@@ -0,0 +1,8 @@
+import { environment } from '../../../environments/environment';
+
+export const API_HOSTS = {
+  identity: environment.api.identity,
+  masterAdmin: environment.api.masterAdmin,
+} as const;
+
+export type ApiHost = keyof typeof API_HOSTS;