Upstream changes
- Merge branch 'weblate-integration' into 'master'
- let's use gitlab rss feed in phpunit for now
- Translated using Weblate (German)
- auto create MR on push into weblate-integration
- cache_starred_images - make scheduled tasks intervals configurable
- add phpunit when running without /tt-rss
- Merge branch 'limit-web-root-to-nginx' into 'master'
- remove APP_WEB_ROOT from fpm container because it expect a different value from nginx container, replace with APP_INSTALL_BASE_DIR specific to fpm container