Downgrade composer version and other changes to support operator MR
- Downgrade composer version to
1.10.20to resolves install errors with composer-project Closes https://gitlab.cern.ch/webservices/webframeworks-planning/-/issues/253 - Change PHP URL in Nginx config to support drupalsite-operator#25 (closed) and drupalsite-operator!19 (merged)
- Install required tooling in php-base and use it instead of building a new drush image. Relates to https://gitlab.cern.ch/webservices/webframeworks-planning/-/issues/244 and drupalsite-operator!19 (merged)