Update README.md

Add deep dive links

README.md

@@ -8,6 +8,7 @@
   </a>
 </p>
 
+
 - [Hinted Handoff](https://systemdesign.one/hinted-handoff/)
 - [Consistency Patterns](https://systemdesign.one/consistency-patterns/)
 - [Gossip Protocol](https://systemdesign.one/gossip-protocol/)
@@ -18,3 +19,13 @@
 - [Consistent Hashing](https://systemdesign.one/consistent-hashing-explained/)
 - [How to Troubleshoot if You Can’t Access a Particular Website?](https://systemdesign.one/how-to-troubleshoot-if-you-cannot-access-a-website/)
 - [What Happens When You Type a URL Into Your Browser?](https://systemdesign.one/what-happens-when-you-type-url-into-your-browser/)
+- [System Design Interview Cheat Sheet](https://systemdesign.one/system-design-interview-cheatsheet/)
+
+
+- [Slack Architecture](https://systemdesign.one/slack-architecture/)
+- [Distributed Counter](https://systemdesign.one/distributed-counter-system-design/)
+- [Real Time Presence Platform](https://systemdesign.one/real-time-presence-platform-system-design/)
+- [Real-Time Live Comments](https://systemdesign.one/live-comment-system-design/)
+- [Real-Time Gaming Leaderboard](https://systemdesign.one/leaderboard-system-design/)
+- [Pastebin](https://systemdesign.one/system-design-pastebin/)
+- [URL Shortener](https://systemdesign.one/url-shortening-system-design/)