stubbed /render endpoint

src/routes/render/+server.ts

@@ -0,0 +1,13 @@
+import { error, json, type RequestEvent } from '@sveltejs/kit';
+
+export async function POST({ request }: RequestEvent) {
+  if (!(request.headers.get('Content-Type') ?? 'bad').includes('text/html')) {
+    error(400, 'request body not HTML');
+  }
+
+  if (!request.body) {
+    error(400, 'no body in request');
+  }
+
+  return json({ msg: 'to be implemented' });
+}