Update vercel.json for better Vercel deployment compatibility

- Add explicit runtime python3.11 specification
- Add buildCommand, devCommand, and installCommand for clear build process
- Improve Vercel configuration for FastAPI deployment
- Prepare for Vercel Dashboard Node.js 20.x configuration

Author: Neil Munoz

vercel.json

@@ -3,7 +3,8 @@
   "functions": {
     "api/index.py": {
       "maxDuration": 30,
-      "memory": 1024
+      "memory": 1024,
+      "runtime": "python3.11"
     }
   },
   "routes": [
@@ -17,5 +18,8 @@
   },
   "regions": [
     "iad1"
-  ]
+  ],
+  "buildCommand": null,
+  "devCommand": null,
+  "installCommand": "pip install -r api/requirements.txt"
 }