Remove the proper cookie when logging out

Proper is a stretch... more like *the*

src/invidious_export_server/blueprints/auth/__init__.py

@@ -40,5 +40,6 @@ async def login_post():
 async def logout():
     response = await make_response(redirect(url_for('index')))
     response.delete_cookie('SID')
+    response.delete_cookie('SID', domain="." + request.host) # another invidious surprise
 
     return response