Add freenode URL

Closes #21.

_config_dev.yml

@@ -14,6 +14,7 @@ github_url:
 mastodon_url: https://sunbeam.city/@autonomic
 twitter_url: https://twitter.com/autonomiccoop
 gitea_url: https://git.autonomic.zone/autonomic-cooperative/
+irc_url: https://webchat.freenode.net/?#autonomic.zone
 markdown: kramdown
 permalink: pretty
 collections:

_config_prod.yml

@@ -14,6 +14,7 @@ github_url:
 mastodon_url: https://sunbeam.city/@autonomic
 twitter_url: https://twitter.com/autonomiccoop
 gitea_url: https://git.autonomic.zone/autonomic-cooperative/
+irc_url: https://webchat.freenode.net/?#autonomic.zone
 markdown: kramdown
 permalink: pretty
 collections:

src/_includes/footer.html

@@ -26,6 +26,11 @@
             <img alt="gitea" style="height: 2.3rem;" src="{{ '/assets/svg/Gitea_Logo.svg' | absolute_url }}">
           </a>
         </li>
+        <li>
+          <a title="IRC" rel="me" href="{{ site.irc_url }}" style="border-bottom: none">
+            <img alt="irc" style="height: 1.5rem;" src="{{ '/assets/images/IRC_logo.png' | absolute_url }}">
+          </a>
+        </li>
       </ul>
 
     </div>