Support Open Graph description (#602)

* Support pytest for running tests

* Support extracting description from meta og:description property

* Revert changes to TOC

* Add test

---------

Co-authored-by: Sascha Ißbrücker <sascha.issbruecker@gmail.com>

requirements.txt

@@ -1,13 +1,12 @@
 asgiref==3.5.2
 beautifulsoup4==4.11.1
-bleach==6.0.0
 bleach-allowlist==1.0.3
+bleach==6.0.0
 certifi==2023.7.22
 charset-normalizer==2.1.1
 click==8.1.3
 confusable-homoglyphs==3.2.0
 coverage==5.5
-Django==4.1.13
 django-appconf==1.0.5
 django-compressor==4.1
 django-debug-toolbar==3.6.0
@@ -15,6 +14,7 @@ django-generate-secret-key==1.0.2
 django-registration==3.3
 django-sass-processor==1.2.1
 django-widget-tweaks==1.4.12
+Django==4.1.13
 django4-background-tasks==1.2.7
 djangorestframework==3.13.1
 greenlet==3.0.1
@@ -24,6 +24,8 @@ Markdown==3.4.3
 playwright==1.40.0
 psycopg2-binary==2.9.5
 pyee==11.0.1
+pytest-django==4.7.0
+pytest==7.4.4
 python-dateutil==2.8.2
 pytz==2022.2.1
 rcssmin==1.1.0