When I upgraded from 2.2.0 to 2.2.2
I having an issue with 404 on the homepage.
every setting in
stores/configurations/general/web/default pages seems to be ok, even checked the core_config_data table which also seems to be alright.
I have deleted all modules/themes to avoid conflicts
var folder deleted
i have used
php bin/magento setup:upgrade
php bin/magento setup:static-content:deploy
couple of times already