Fix issue where footer/name can break templates

stringify the template variables at render time

JSON.stringify - will escape out quotes
<%- renders as-is without any more escaping

dashboard/setupaccount.html

@@ -4,10 +4,11 @@
     <title><%= name %> Account Setup</title>
 
     <script>
-      window.cloudron = {};
-      window.cloudron.name = '<%= name %>';
-      window.cloudron.footer = `<%- footer -%>`;
-      window.cloudron.language = `<%= language %>`;
+      window.cloudron = <%- JSON.stringify({
+        name: name,
+        footer: footer,
+        language: language
+      }) %>;
     </script>
 
   </head>