Fix code quality issues and add package-lock.json

cypress.config.js

@@ -1,10 +1,13 @@
+/* eslint-env node */
+
 const { defineConfig } = require('cypress');
 
 module.exports = defineConfig({
   e2e: {
     baseUrl: 'http://localhost:8888',
     setupNodeEvents() {
-      // implement node event listeners here
-    },
-  },
+      // This function can be used to register custom Cypress plugins or event listeners.
+      // Currently not in use, but left for future extensibility.
+    }
+  }
 });