Add newsletter

Author: msrahimii

docs/contact_us.md

@@ -8,3 +8,17 @@ If you prefer to communicate via email:
 
 - For general inquiries (e.g., colaboration, tutorial for your group, licensing), contact the PI:  
    Masoud Zarepisheh — [zarepism@mskcc.org](mailto:zarepism@mskcc.org)
+
+
+## Stay Updated with PortPy
+
+<div style="background: #f8f9fa; padding: 1rem; border-radius: 8px; margin: 1rem 0; border-left: 4px solid #4051b5;">
+  <h4 style="margin-top: 0; color: #4051b5;">📧 Newsletter Signup</h4>
+  <p style="margin-bottom: 1rem; color: #666; font-size: 14px;">Get updates on new features, tutorials, and development:</p>
+  
+  <iframe src="https://docs.google.com/forms/d/e/1FAIpQLSdyRixVrHtPnfIvUr866tXbGVQqFWCur-SAOjqf6BzoeF-BaA/viewform?embedded=true" 
+          width="100%" height="400" frameborder="0" marginheight="0" marginwidth="0"
+          style="border: none; border-radius: 4px; background: white;">
+    Loading newsletter signup form...
+  </iframe>
+</div>