Merging develop into main

• gitlab-drupal-ci#54 Remove composer downgrade
• Add support for Drupal CMS

run/scripts/start

@@ -62,7 +62,6 @@ function startContainer() {
         --env HOME=/home/${USERNAME}
         --env USERNAME=${USERNAME}
         --env COMPOSE_PROJECT_NAME=${COMPOSE_PROJECT_NAME}
-        --env COMPOSER_DOWNGRADE=${COMPOSER_DOWNGRADE}
         --env PHP_VERSION=${PHP_VERSION}
         --volume ${L3DDOCKERHOST}:/var/run/docker.sock
         --volume ${WORKDIR}:/drupal