create app template for dkr app (#4136)

dashboard/src/main/home/cluster-dashboard/preview-environments/v2/setup-app/PreviewAppDataContainer.tsx

@@ -10,7 +10,7 @@ import { type PorterApp } from "@porter-dev/api-contracts";
 import axios from "axios";
 import _ from "lodash";
 import { FormProvider, useForm } from "react-hook-form";
-import { Redirect, useHistory } from "react-router";
+import { useHistory } from "react-router";
 import { match } from "ts-pattern";
 import { z } from "zod";
 
@@ -233,7 +233,7 @@ export const PreviewAppDataContainer: React.FC<Props> = ({
         }, {});
       setFinalizedAppEnv({ variables, secrets });
 
-      if (!existingTemplate) {
+      if (latestSource.type === "github" && !existingTemplate) {
         setShowGHAModal(true);
         return;
       }
@@ -318,10 +318,6 @@ export const PreviewAppDataContainer: React.FC<Props> = ({
     });
   }, [withPreviewOverrides, latestSource, existingAddonsWithEnv]);
 
-  if (latestSource.type !== "github") {
-    return <Redirect to={`/apps/${porterApp.name}`} />;
-  }
-
   return (
     <FormProvider {...porterAppFormMethods}>
       <TabSelector