CORS issue

[jktittalom]

Hi,
I have installed CKAN and PortalJs in local both are working. But I am getting following error in the Home screen while loading stats:
e.g. Access to fetch at 'http://localhost:5000/api/3/action/package_search?rows=0' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

I have added following in the lab/apolloClient.ts:
const restLink = new RestLink({
uri: getConfig().publicRuntimeConfig.DMS + '/api/3/action/',
headers: {
'Access-Control-Allow-Origin':'*',
'Access-Control-Allow-Credentials':'true',
'Accept':'application/json',
'Accept-Language':'en-US',
'Content-Language':'en-US',
'Content-Type': 'application/json',
'mode': 'no-cors',
'Access-Control-Allow-Methods':'GET,POST,OPTIONS,DELETE,PUT',
'Referrer-Policy':'no-referrer',
'Connection':'Keep-Alive',
'Access-Control-Allow-Headers':'Origin, X-Requested-With, Content-Type, Accept',

},

But still it showing CORS related issue. Well in home page I can see recent dataset from CKAN but seeing issue getting data for search related data only.

Please share solution.
Thanks,