appsettingsyarp.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*",
  "ReverseProxy": {
    "Routes": [
      {
        "RouteId": "app1",
        "BackendId": "backend1",
        "Match": {
          "Host": "localhost"
        }
      }
    ],
    "Backends": {
      "backend1": {
        "Destinations": {
          "backend1_destination1": {
            "Address": "http://upstream-server:5001/"
          }
        }
      }
    }
  }
}