Add data volume to RabbitMQ resource

Needs to run this in AppHost project folder first:
dotnet user-secrets set Parameters:rabbitmq-password AnyPasswordYouWant

src/Aspire/NCafe.AppHost/Program.cs

@@ -5,6 +5,7 @@
     .WithDataVolume();
 
 var rabbitMq = builder.AddRabbitMQ("rabbitmq")
+    .WithDataVolume()
     .WithHealthCheck()
     .WithManagementPlugin();