fixing sequence typing (#9)

Author: bigtallcampbell

src/Program.cs

@@ -40,7 +40,6 @@ public static void Main(string[] args) {
                 await context.Response.WriteAsync("Communication with gRPC endpoints must be made through a gRPC client. To learn how to create a client, visit: https://go.microsoft.com/fwlink/?linkid=2086909");
             });
         });
-        app.Run();
 
         // Add a middleware to catch exceptions and stop the host gracefully
         app.Use(async (context, next) => {
@@ -54,5 +53,7 @@ public static void Main(string[] args) {
                 lifetime?.StopApplication();
             }
         });
+
+        app.Run();
     }
 }