Hard code discussion URL

Author: Mike Jang

source/conf.py

@@ -32,6 +32,7 @@
 """.format(release_date)
 
 edit_on_github_project = 'nginx/unit-docs'
+edit_on_github_discussion = 'nginx/unit'
 edit_on_github_branch = 'master'
 
 exclude_patterns = ['include']

source/theme/layout.html

@@ -121,6 +121,9 @@ <h1>
     {% if edit_on_github_url %}
     <div class="nxt_github_link"><a href="{{ edit_on_github_url }}"><div></div>Edit this page</a></div>
     {% endif %}
+    {% if edit_on_github_url %}
+    <div class="nxt_github_link"><a href="https://github.com/nginx/unit/discussions/"><div></div>Discuss this software</a></div>
+    {% endif %}
     <p id="footer">
         © {{copyright}} <a href="https://www.nginx.com/">{{author}}</a>
     </p>