Fix info.ftl page rendering in storybook

src/login/pages/Info.tsx

@@ -8,7 +8,10 @@ export default function Info(props: PageProps<Extract<KcContext, { pageId: "info
 
     const { msgStr, msg } = i18n;
 
-    assert(kcContext.message !== undefined);
+    assert(
+        kcContext.message !== undefined,
+        "No message in kcContext.message, there will always be a message in production context, add it in your mock"
+    );
 
     const { messageHeader, message, requiredActions, skipLink, pageRedirectUri, actionUri, client } = kcContext;
 

stories/login/pages/Info.stories.tsx

@@ -21,4 +21,13 @@ const meta: ComponentMeta<any> = {
 
 export default meta;
 
-export const Default = () => <PageStory />;
+export const Default = () => (
+    <PageStory
+        kcContext={{
+            message: {
+                summary: "This is the server message",
+                type: "info"
+            }
+        }}
+    />
+);