added vercel configurations

vercel.json

@@ -0,0 +1,15 @@
+{
+    "devCommand":"uvicorn main:app --host 0.0.0.0 --port 3000",
+    "builds": [
+        {
+            "src": "main.py",
+            "use":"@vercel/python"
+        }
+    ],
+    "routes":[
+        {
+            "src":"(.*)",
+            "dest":"main.py"
+        }    
+    ]
+}