Load the direct-transfer protocol from public/ inside the container image

server/direct-relay.js

@@ -1,5 +1,13 @@
 import { randomBytes } from 'node:crypto';
-import protocol from '../frontend/direct-protocol.js';
+import { existsSync } from 'node:fs';
+import { createRequire } from 'node:module';
+
+// The image copies frontend/ to ./public, so fall back to that path in production.
+const protocol = createRequire(import.meta.url)(
+  existsSync(new URL('../frontend/direct-protocol.js', import.meta.url))
+    ? '../frontend/direct-protocol.js'
+    : './public/direct-protocol.js',
+);
 
 // One instance per authenticated room. It has no media endpoint or binary path.
 export function createDirectRelay({ now = Date.now } = {}) {