feat: Introduce app serializer

packages/backend/src/serializers/app.js

@@ -0,0 +1,12 @@
+const appSerializer = (app) => {
+  return {
+    name: app.name,
+    key: app.key,
+    iconUrl: app.iconUrl,
+    authDocUrl: app.authDocUrl,
+    supportsConnections: app.supportsConnections,
+    primaryColor: app.primaryColor,
+  };
+};
+
+export default appSerializer;