try this
[
{
"AllowedHeaders": ["*"],
"AllowedMethods": ["GET", "HEAD"],
"AllowedOrigins": ["*"],
"ExposeHeaders": ["Content-Type", "Content-Length", "ETag"],
"MaxAgeSeconds": 3000
}
]
or use a proxy server if still its not working i.e fetch to node server then use in front-end