Fix adding a tag to a container group

azure/backend.go

@@ -196,16 +196,16 @@ func (cs *aciContainerService) Run(ctx context.Context, r containers.ContainerCo
 	if err != nil {
 		return err
 	}
-	addTag(groupDefinition, singleContainerTag)
+	addTag(&groupDefinition, singleContainerTag)
 
 	return createACIContainers(ctx, cs.ctx, groupDefinition)
 }
 
-func addTag(groupDefinition containerinstance.ContainerGroup, tagName string) {
+func addTag(groupDefinition *containerinstance.ContainerGroup, tagName string) {
 	if groupDefinition.Tags == nil {
 		groupDefinition.Tags = make(map[string]*string, 1)
 	}
-	groupDefinition.Tags[tagName] = to.StringPtr("")
+	groupDefinition.Tags[tagName] = to.StringPtr(tagName)
 }
 
 func (cs *aciContainerService) Stop(ctx context.Context, containerName string, timeout *uint32) error {
@@ -332,7 +332,7 @@ func (cs *aciComposeService) Up(ctx context.Context, opts cli.ProjectOptions) er
 	}
 	logrus.Debugf("Up on project with name %q\n", project.Name)
 	groupDefinition, err := convert.ToContainerGroup(cs.ctx, *project)
-	addTag(groupDefinition, composeContainerTag)
+	addTag(&groupDefinition, composeContainerTag)
 
 	if err != nil {
 		return err