fix: fix custom tracker script file route error in production

.gitignore

@@ -1,5 +1,5 @@
 .env
-public/tracker.js
+src/client/public/tracker.js
 geo
 
 # Logs

src/server/app.ts

@@ -50,7 +50,7 @@ app.use('/trpc', trpcExpressMiddleware);
 
 if (env.customTrackerScriptName) {
   app.get(`/${env.customTrackerScriptName}`, (req, res) =>
-    res.sendFile(path.resolve(__dirname, './public/tracker.js'))
+    res.sendFile(path.resolve(process.cwd(), './public/tracker.js'))
   );
 }