fix: improved offline support

Closes coop-cloud/organising#471.

cli/app/version.go

@@ -38,6 +38,7 @@ var appVersionCommand = cli.Command{
 	Flags: []cli.Flag{
 		internal.DebugFlag,
 		internal.NoInputFlag,
+		internal.OfflineFlag,
 	},
 	Before: internal.SubCommandBefore,
 	Usage:  "Show app versions",
@@ -47,9 +48,9 @@ the individual image names, tags and digests. But also the Co-op Cloud recipe
 version.
 `,
 	Action: func(c *cli.Context) error {
-		app := internal.ValidateApp(c)
+		conf := runtime.New(runtime.WithOffline(internal.Offline))
+		app := internal.ValidateApp(c, conf)
 		stackName := app.StackName()
-		conf := runtime.New()
 
 		cl, err := client.New(app.Server)
 		if err != nil {