Django Vercel Deployment

vercel.json 

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

-------Not necessary-----
build_files.sh 

pip install -r requirements.txt 
python3.9 manage.py collectstatic
---------------------------

settings.py
-------------
ALLOWED_HOSTS = ['.vercel.app','now.sh','127.0.0.1','localhost']

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': env("DB_NAME"),
        'USER': env("DB_USER"),
        'PASSWORD': env("DB_PASSWORD"),
        'HOST': env("DB_HOST"),
        'PORT': env("DB_PORT"),
    }
}


STATICFILES_DIRS = os.path.join(BASE_DIR, 'static'),
STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles_build', 'static')

urls.py
---------
urlpatterns += static(settings.MEDIA_URL, document_root = settings.MEDIA_ROOT)
urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)

wsgi.py
-------
app = application

### Must remove the psycopg2 from your requiremnets.txt