Remove ads and cookie banners from HTML snapshots (#695)

* integrate ublock with single-file

* reuse chromium profile

bootstrap.sh

@@ -9,6 +9,8 @@ mkdir -p data
 mkdir -p data/favicons
 # Create assets folder if it does not exist
 mkdir -p data/assets
+# Create chromium profile folder if it does not exist
+mkdir -p chromium-profile
 
 # Generate secret key file if it does not exist
 python manage.py generate_secret_key
@@ -21,8 +23,9 @@ python manage.py create_initial_superuser
 # Migrate legacy background tasks to Huey
 python manage.py migrate_tasks
 
-# Ensure the DB folder is owned by the right user
+# Ensure folders are owned by the right user
 chown -R www-data: /etc/linkding/data
+chown -R www-data: /etc/linkding/chromium-profile
 
 # Start background task processor using supervisord, unless explicitly disabled
 if [ "$LD_DISABLE_BACKGROUND_TASKS" != "True" ]; then