Fix y-websocket sidecar: use v1 with setupWSConnection

y-websocket v2 removed the server binary. Use v1 which includes
bin/utils.js with setupWSConnection for the WS relay server.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -52,7 +52,22 @@ services:
     container_name: rnotes-yws
     restart: unless-stopped
     working_dir: /app
-    command: ["sh", "-c", "npm install y-websocket && node node_modules/y-websocket/bin/server.cjs"]
+    command:
+      - sh
+      - -c
+      - |
+        npm init -y > /dev/null 2>&1
+        npm install y-websocket@1 ws > /dev/null 2>&1
+        node -e "
+        const ws = require('ws');
+        const Y = require('yjs');
+        const {setupWSConnection, docs} = require('y-websocket/bin/utils');
+        const host = process.env.HOST || '0.0.0.0';
+        const port = parseInt(process.env.PORT || '1234');
+        const wss = new ws.Server({ host, port });
+        wss.on('connection', setupWSConnection);
+        console.log('y-websocket server running on ' + host + ':' + port);
+        "
     environment:
       - HOST=0.0.0.0
       - PORT=1234