chore: change folder name from 'serverless' to 'api'

vercel.json

@@ -2,7 +2,7 @@
     "rewrites": [
         {
             "source": "/(.*)",
-            "destination": "./api/serverless.ts"
+            "destination": "./api/vercel.ts"
         }
     ]
 }

web/index.ts

@@ -4,13 +4,12 @@ export default async (
     fastify: FastifyInstance,
     _: FastifyPluginOptions,
     done: (err?: Error) => void) => {
-
   fastify.get('/docs', (_, reply) => {
-      reply.redirect(301, 'https://docs.tiktok-dl.tslab.site');
+    reply.redirect(301, 'https://docs.tiktok-dl.tslab.site');
   });
   // API
   fastify.register(import('./api'), {
-      prefix: '/api',
+    prefix: '/api',
   });
   done();
 };