Add Mastodon verification and bmac widget

overrides/main.html

@@ -56,11 +56,11 @@ <h2 id="__comments">{{ lang.t("meta.comments") }}</h2>
   <script async defer data-domain="docs.tifflabs.org" src="https://plausible.io/js/plausible.js"></script>
 {% endblock %}
 
-<!-- {% block site_nav %} -->
-  {% if page is.home %}
+{% block site_nav %}
+  {% if page.is_homepage %}
   <script data-name="BMC-Widget" data-cfasync="false" src="https://cdnjs.buymeacoffee.com/1.0.0/widget.prod.min.js"
     data-id="tifflabs" data-description="Support me on Buy me a coffee!"
     data-message="Thanks for allowing me to continue tiff labs. If you like it, beer me! 🍻" data-color="#FF0000"
     data-position="Right" data-x_margin="18" data-y_margin="18"></script>
   {% endif %}
-<!-- {% endblock %} -->
+{% endblock %}