LIL-206. Add meta descriptiont

apps/course/templates/course/course.html

@@ -3,6 +3,7 @@
 {% load data_liked from data_liked %}
 {% load rupluralize from plural %}
 {% block title %}{{ course.title }} - {{ block.super }}{% endblock title %}
+{% block description %}{{ course.title }} - {{ block.super }}{% endblock description%}
 {% block content %}
 <div class="section section_border">
   <div class="section__center center center_sm">

project/templates/lilcity/index.html

@@ -15,7 +15,7 @@
   <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
   <meta name="theme-color" content="#fff">
   <meta name="format-detection" content="telephone=no">
-  <meta name="description" content="Page description">
+  <meta name="description" content="{% block description %}Онлайн-курсы LilCity{% endblock description%}">
   <!--Twitter Card data-->
   <meta name="twitter:card" content="summary">
   <meta name="twitter:site" content="@publisher_handle">