превью и улучшение seo

library_service/templates/base.html

@@ -7,9 +7,7 @@
         <meta property="og:title" content="{{ title }}" />
         <meta property="og:type" content="website" />
         <meta property="og:description" content="Ваша персональная библиотека книг" />
-        <!--<meta property="og:image" content="//{{ domain }}/img/{{ img }}.png" />-->
-        <meta property="og:url" content="//{{ domain }}/" />
-
+        <meta property="og:url" content="{{ request.url.scheme }}://{{ domain }}/" />
         <script
             defer
             src="https://cdn.jsdelivr.net/npm/alpinejs@3.13.3/dist/cdn.min.js"

library_service/templates/book.html

@@ -303,3 +303,8 @@
 {% endblock %} {% block scripts %}
 <script src="/static/page/book.js"></script>
 {% endblock %}
+{% block extra_head %}
+{% if img %}
+<meta property="og:image" content="{{ request.url.scheme }}://{{ domain }}/static/books/{{ img }}.jpg" />
+{% endif %}
+{% endblock %}