feat: service name in ps output

pkg/service/service.go

@@ -67,3 +67,12 @@ func GetService(c context.Context, cl *client.Client, filters filters.Args, prom
 
 	return services[0], nil
 }
+
+// ContainerToServiceName converts a container name to a service name.
+func ContainerToServiceName(containerNames []string, stackName string) string {
+	containerName := strings.Join(containerNames, "")
+	trimmed := strings.TrimPrefix(containerName, "/")
+	stackNameServiceName := strings.Split(trimmed, ".")[0]
+	splitter := fmt.Sprintf("%s_", stackName)
+	return strings.Split(stackNameServiceName, splitter)[1]
+}