feat(serializers): add config serializer

packages/backend/src/serializers/config.js

@@ -0,0 +1,17 @@
+const configSerializer = (config) => {
+  return {
+    id: config.id,
+    updatedAt: config.updatedAt.getTime(),
+    createdAt: config.createdAt.getTime(),
+    disableFavicon: config.disableFavicon,
+    disableNotificationsPage: config.disableNotificationsPage,
+    logoSvgData: config.logoSvgData,
+    palettePrimaryDark: config.palettePrimaryDark,
+    palettePrimaryMain: config.palettePrimaryMain,
+    palettePrimaryLight: config.palettePrimaryLight,
+    installationCompleted: config.installationCompleted,
+    title: config.title,
+  };
+};
+
+export default configSerializer;