angular7 http get Reason: CORS header ‘Access-Control-Allow-Origin’ missing code example

Example: adding cors in angular

"architect": {
    "serve": {
            "builder": "@angular-devkit/build-angular:dev-server",
            "options": {
                "browserTarget": "project-name:build",
                "proxyConfig": "src/proxy.conf.json"
            },
          }
}