more boilerplate and dev environment

frontend/src/lib/models/user.js

@@ -0,0 +1,16 @@
+/**
+ * @typedef {Object} User
+ * @property {string} userId
+ * @property {string} rootObjectId
+ */
+
+/**
+ * Create a User object.
+ *
+ * @param {string} userId
+ * @param {string} rootObjectId
+ * @returns {User}
+ */
+export function createUserModel(userId, rootObjectId) {
+	return { userId, rootObjectId };
+}