show information about slow starting services on start

src/service.rs

@@ -205,6 +205,14 @@ pub trait ServiceTrait {
     fn exec_shell(&self) -> &'static str {
         "bash"
     }
+
+    /// Allow services to delay the completion of the `start` command untill they are fully setup
+    ///
+    /// This is not for services which are critical for the running of the instance (use `is_healthy` for that)
+    /// But instead for cases where the instance is mostly usable, but might have some missing features
+    async fn final_wait(&self, _docker: &Docker, _cloud_id: &str) -> Result<()> {
+        Ok(())
+    }
 }
 
 #[derive(Clone, Eq, PartialEq, Debug)]