feat: Add app config serializer

packages/backend/src/serializers/app-config.js

@@ -0,0 +1,15 @@
+const appConfigSerializer = (appConfig) => {
+  return {
+    id: appConfig.id,
+    key: appConfig.key,
+    allowCustomConnection: appConfig.allowCustomConnection,
+    shared: appConfig.shared,
+    disabled: appConfig.disabled,
+    canConnect: appConfig.canConnect,
+    canCustomConnect: appConfig.canCustomConnect,
+    createdAt: appConfig.createdAt.getTime(),
+    updatedAt: appConfig.updatedAt.getTime(),
+  };
+};
+
+export default appConfigSerializer;