Revise README for DevOps Engineer portfolio

Updated the README to include portfolio details and a live link.

Author: shahealamit

README.md

@@ -1 +1,8 @@
-# MdShahealam_Portfolio
+DevOps Engineer Portfolio
+
+Live Website  
+https://shahealamit.github.io/
+
+This repository hosts my personal DevOps portfolio website built with GitHub Pages.
+
+It showcases hands-on DevOps work including CI/CD pipelines, Jenkins automation, Docker containers, AWS EC2 deployments, Linux server operations, and cloud-based workflows.