Fix og:image to use absolute URLs for social media compatibility

Co-authored-by: honzajavorek <[email protected]>

Author: Copilot

docs/_templates/page.html

@@ -12,7 +12,11 @@
 
 {%- block extrahead %}
   {{ super() }}
-  <meta property="og:image" content="{{ pathto('_static/images/og-image.png', 1) }}">
+  {%- if site_baseurl -%}
+    <meta property="og:image" content="{{ site_baseurl.rstrip('/') }}/{{ pathto('_static/images/og-image.png', 1).lstrip('./') }}">
+  {%- else -%}
+    <meta property="og:image" content="{{ pathto('_static/images/og-image.png', 1) }}">
+  {%- endif -%}
   <meta property="og:image:type" content="image/png">
   <meta property="og:image:alt" content="Ilustrace organizátora Python akcí">
-{%- endblock -%}
+{%- endblock -%}

docs/conf.py

@@ -151,3 +151,9 @@
 def setup(app):
     app.add_css_file("custom.css")
     app.add_js_file("redirect.js")
+    
+    # Make html_baseurl available in templates as site_baseurl
+    def add_baseurl_to_context(app, pagename, templatename, context, doctree):
+        context['site_baseurl'] = app.config.html_baseurl
+    
+    app.connect('html-page-context', add_baseurl_to_context)