vercel.json
{
"headers": [
{
"source": "/api/(.*)",
"headers": [
{ "key": "Access-Control-Allow-Credentials", "value": "true" },
{ "key": "Access-Control-Allow-Origin", "value": "*" },
{ "key": "Access-Control-Allow-Methods", "value": "GET,OPTIONS,PATCH,DELETE,POST,PUT" },
{ "key": "Access-Control-Allow-Headers", "value": "X-CSRF-Token, X-Requested-With, Accept, Accept-Version, Content-Length, Content-MD5, Content-Type, Date, X-Api-Version" }
]
}
]
}