Added hackathons section

Author: kkkkkabir

README.md

@@ -227,6 +227,17 @@ Useful articles and learning resources.
 - [This Developer's Life](https://daraoladapo.com/thisdevlife/) - A Podcast about developer work and life balance.
 </details>
 
+<details>
+  <summary>
+    :space_invader: Hackathons
+  </summary>
+  
+<br /> 
+
+- [Devpost](https://devpost.com/) - An awesome place for hackathons.
+- [hackathon.io](https://www.hackathon.io/events) - A place where lots of hackathons are hosted.
+</details>
+
 <details>
   <summary>
     🎊 Fun