fix(db): provide fallback dummy DB URL to prevent build evaluation crash

Author: DongDuong2001

src/db/index.ts

@@ -2,7 +2,7 @@ import { neon } from "@neondatabase/serverless";
 import { drizzle } from "drizzle-orm/neon-http";
 import * as schema from "./schema";
 
-const sql = neon(process.env.DATABASE_URL!);
+const sql = neon(process.env.DATABASE_URL || "postgresql://dummy:dummy@localhost/dummy");
 
 export const db = drizzle(sql, { schema });