Add ads.txt file for advertising partner information

Adds a new route to serve the ads.txt file from the public directory, allowing advertising partners to access necessary information.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: d7424866-83d1-4486-a212-ac12b4c7becf
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/d7424866-83d1-4486-a212-ac12b4c7becf/JzV8bfS

server/routes.ts

@@ -456,6 +456,12 @@ export async function registerRoutes(app: Express): Promise<Server> {
 
 
 
+  // Serve ads.txt file specifically
+  app.get("/ads.txt", (req, res) => {
+    res.type("text/plain");
+    res.sendFile(path.join(__dirname, "../client/public/ads.txt"));
+  });
+
   const httpServer = createServer(app);
   return httpServer;
 }