起動時にRedisの疎通確認を行う (#9832)

* 起動時にRedisの疎通確認を行う

* check:connectをstart内に移動

---------

Co-authored-by: tamaina <tamaina@hotmail.co.jp>

packages/backend/check_connect.js

@@ -0,0 +1,10 @@
+import {loadConfig} from './built/config.js';
+import {createRedisConnection} from "./built/redis.js";
+
+const config = loadConfig();
+const redis = createRedisConnection(config);
+
+redis.on('connect', () => redis.disconnect());
+redis.on('error', (e) => {
+    throw e;
+});