Fix beginner roadmaps not working

src/pages/[roadmapId]/index.json.ts

@@ -1,11 +1,39 @@
 import type { APIRoute } from 'astro';
 
-export const GET: APIRoute = async function ({ params, request, props }) {
+export const GET: APIRoute = async function ({ params, url, request, props }) {
-  const { roadmapId } = params;
+  const { roadmapId: fullRoadmapId } = params;
+  if (!fullRoadmapId) {
+    return new Response(
+      JSON.stringify({
+        data: null,
+        error: {
+          message: 'Roadmap not found',
+        },
+      }),
+      {
+        status: 500,
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      },
+    );
+  }
+
+  // to account for `roadmap/roadmap-beginner.json` files
+  const roadmapId =
+    fullRoadmapId?.indexOf('-beginner') !== -1
+      ? fullRoadmapId.replace('-beginner', '')
+      : fullRoadmapId;
+
+  const fileName =
+    roadmapId === fullRoadmapId
+      ? `${roadmapId}.json`
+      : `${fullRoadmapId}.json`;
 
+  console.log(fileName);
   try {
     const roadmapJson = await import(
-      `../../data/roadmaps/${roadmapId}/${roadmapId}.json`
+      `../../data/roadmaps/${roadmapId}/${fileName}`
     );
 
     return new Response(JSON.stringify(roadmapJson), {