just use fetch and a buffer

scripts/server.js

@@ -9,9 +9,22 @@ app.use("/assets", express.static('assets'));
 
 app.use("/", express.static('pages'));
 
-app.use("/files", createProxyMiddleware({
-  target: config.files_url
-}));
+app.get('/files/*', async (req, res) => {
+  console.log(req.params);
+  // Get events
+  let eventsReq = await fetch(new URL(req.params[0], config.files_url));
+  let events;
+  if (eventsReq.ok)
+    events = await eventsReq.arrayBuffer();
+  else
+    return res.status(eventsReq.status).send(await eventsReq.text());
+
+  console.log(events);
+
+  res.type(eventsReq.headers.get("Content-Type"));
+
+  return res.send(Buffer.from(events));
+})
 
 app.get('/data/:lang/events/:floor', async (req, res) => {
   // Get events