unable to access demo backend "https://spartacus-demo.eastus.cloudapp.azure.com:8443"

Question

I'm getting CORS error when accessing the demo backend. Is this supposed to be working?

I'm using "@spartacus/storefront": "~4.3.8",

I added a proxy.conf.json file in Spartacus project root but didnt work

{
  "/occ/v2/": {
    "target": "https://spartacus-demo.eastus.cloudapp.azure.com:8443",
    "secure": true,
    "changeOrigin": true,
    "logLevel": "debug"
  }
}