Fix frontend API base URL for production

Author: colto

frontend/src/api.ts

@@ -1,4 +1,5 @@
-export const API_BASE_URL = import.meta.env.VITE_API_BASE_URL as string;
+const rawBase = import.meta.env.VITE_API_BASE_URL;
+export const API_BASE_URL = (rawBase ? String(rawBase) : "").replace(/\/+$/, "");
 
 export type ServiceInstance = {
     id: number;
@@ -32,4 +33,4 @@ export async function createService(input: {
     }
 
     return res.json();
-}
+}