fix: Move content into to frontend directory

Doing this BEFORE the merge prevents a lot of merge conflicts.

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

frontend/src/components/intro-page/requests.ts

@@ -0,0 +1,25 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { defaultConfig } from '../../api/common/default-config'
+
+/**
+ * Get the intro.md contents from the public directory.
+ *
+ * @return The content of intro.md
+ * @throws {Error} if the content can't be fetched
+ */
+export const fetchFrontPageContent = async (): Promise<string> => {
+  const response = await fetch('public/intro.md', {
+    ...defaultConfig,
+    method: 'GET'
+  })
+  if (response.status !== 200) {
+    throw new Error('Error fetching intro content')
+  }
+
+  return await response.text()
+}