fix: build files

build_files.sh

+python3.9 -m venv env
+python3.9 source env/bin/activate
+pip install -r requirements.txt --root-user-action=ignore
+python3.9 manage.py collectstatic --noinput
\ No newline at end of file

vercel.json

 {
+  "version": 2,
+  "builds": [
+    {
+      "src": "config/wsgi.py",
+      "use": "@vercel/python",
+      "config": { "maxLambdaSize": "15mb", "runtime": "python3.9" }
+    },
+    {
+      "src": "build_files.sh",
+      "use": "@vercel/static-build",
+      "config": {
+        "distDir": "staticfiles"
+      }
+    }
+  ],
   "routes": [
+    {
+      "src": "/static/(.*)",
+      "dest": "/static/$1"
+    },
     {
       "src": "/(.*)",
       "dest": "config/wsgi.py"