fix(create-app): update prompt message based on user input (#2103)

Author: jamesgeorge007

packages/create-app/index.js

@@ -76,12 +76,15 @@ async function init() {
 
   // determine template
   let template = argv.t || argv.template
-
-  const availableTemplates = TEMPLATES.map((template) => stripColors(template))
-  const isValidTemplate = availableTemplates.includes(template)
-  const message = isValidTemplate
-    ? `Select a template:`
-    : `${template} isn't a valid template. Please choose from below: `
+  let message = 'Select a template:'
+  let isValidTemplate = false
+
+  // --template expects a value
+  if (typeof template === 'string') {
+    const availableTemplates = TEMPLATES.map(stripColors)
+    isValidTemplate = availableTemplates.includes(template)
+    message = `${template} isn't a valid template. Please choose from below:`
+  }
 
   if (!template || !isValidTemplate) {
     /**