feat: Add follow block

components/Follow.tsx

@@ -0,0 +1,7 @@
+import * as React from 'react';
+
+export const Follow = () => (
+    <div className='block-follow'>
+        If you find this site helpful, follow me on <a href="https://twitter.com/nghuuphuoc">Twitter</a> and <a href="https://github.com/phuocng">GitHub</a> to get more useful content like this.
+    </div>
+);