fix: update fetch API endpoint and adjust rewrites in vercel.json

public/index.html

@@ -38,7 +38,7 @@
 
       try {
         const start = Date.now();
-        const res = await fetch('/api', {
+        const res = await fetch('/', {
           method: 'POST',
           headers: {
             'x-relay-target': target,

vercel.json

@@ -1,5 +1,11 @@
 {
 	"$schema": "https://openapi.vercel.sh/vercel.json",
 	"bunVersion": "1",
-	"installCommand": "bun install"
+	"installCommand": "bun install",
+	"rewrites": [
+		{ "source": "/api", "destination": "/api/index.ts" },
+		{ "source": "/api/(.*)", "destination": "/api/index.ts" },
+		{ "source": "/public/(.*)", "destination": "/public/$1" },
+		{ "source": "/(.*)", "destination": "/public/$1" }
+	]
 }