Add detailed contribution guidelines and enhance community engagement section in index.html

Author: Leolty

index.html

@@ -151,8 +151,16 @@ <h2>Contributors</h2>
             <a href="https://zhiting.ucsd.edu/" target="_blank">Zhiting Hu</a>
         </p>
         <p><em>(* core contributor)</em></p>
+
+        <h2>Get Involved</h2>
+        <p>
+            We are continuously building and improving CocoaBench. CocoaBench is a community-driven benchmark, and we welcome contributions from researchers and practitioners with diverse backgrounds. If you've encountered a challenging real-world problem that pushed your limits, it might make a great benchmark task!
+        </p>
+        <p>
+            We've set up a streamlined <a href="https://github.com/cocoabench/cocoa-agent/blob/main/contrib/CONTRIBUTING.md" target="_blank">task contribution protocol</a> to guide you through creating and submitting new tasks. Contributors with <strong>3 accepted tasks</strong> are eligible for co-authorship on the CocoaBench paper, which we plan to submit to a top-tier ML conference.
+        </p>
         <p>
-            We are continuously building and improving CocoaBench. Collaboration is welcomed! Feel free to reach out to us or join our <a href="https://discord.gg/ZDaDhVCd" target="_blank">Discord community</a>.
+            Have questions or ideas? Feel free to reach out to us or join our <a href="https://discord.gg/ZDaDhVCd" target="_blank">Discord community</a> to propose new tasks or discuss ideas. (If the link doesn't work, try refreshing the page or manually add the server in Discord app using invite code: <code>ZDaDhVCd</code>)
         </p>
 
         <h2>Citation</h2>