Add project files.

Core.Cerberos.External/GatewayConfigurations/GatewayConfiguration.cs

@@ -0,0 +1,19 @@
+using Core.Blueprint.External;
+
+namespace Core.Cerberos.External.GatewayConfigurations
+{
+    public record GatewayConfiguration
+    {
+        public GatewayConfiguration()
+        {
+            CerberosService = new CerberosServiceAPI();
+        }
+
+        public CerberosServiceAPI CerberosService { get; set; }
+    }
+    public record CerberosServiceAPI
+    {
+        public string Channel { get; set; }
+        public BaseEndpoint Endpoint { get; set; }
+    }
+}