refactor!: app name -> domain

cli/app/new.go

@@ -11,7 +11,7 @@ This command takes a recipe and uses it to create a new app. This new app
 configuration is stored in your ~/.abra directory under the appropriate server.
 
 This command does not deploy your app for you. You will need to run "abra app
-deploy <app>" to do so.
+deploy <domain>" to do so.
 
 You can see what recipes are available (i.e. values for the <recipe> argument)
 by running "abra recipe ls".
@@ -36,12 +36,11 @@ var appNewCommand = cli.Command{
 		internal.NoInputFlag,
 		internal.NewAppServerFlag,
 		internal.DomainFlag,
-		internal.NewAppNameFlag,
 		internal.PassFlag,
 		internal.SecretsFlag,
 	},
 	Before:       internal.SubCommandBefore,
-	ArgsUsage:    "<recipe>",
+	ArgsUsage:    "[<recipe>]",
 	Action:       internal.NewAction,
 	BashComplete: autocomplete.RecipeNameComplete,
 }