fix: use prod url in client

client/src/app/announcements.ts

@@ -12,7 +12,7 @@ export class AnnouncementsService {
   public constructor() {}
   // eslint-disable-next-line @typescript-eslint/class-methods-use-this -- Getter for static URL.
   private get url(): string {
-    return "http://localhost:20000/announcements";
+    return "https://hikari.nhcarrigan.com/api/announcements";
   }
 
   public async getAnnouncements(): Promise<