added tailwind design classes, and installed tailwindcss properly.

frontend/tailwind.config.js

@@ -0,0 +1,10 @@
+module.exports = {
+  content: [
+    "./src/**/*.{js,jsx,ts,tsx}",
+    // add other paths if needed
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};