L01ALG-1072 use php 7.4 docker image in cd/cd pipeline

.gitlab-ci.yml

@@ -6,6 +6,9 @@ include:
   ref: v0.4.0
   file: php/gitlab-ci-base-php.yml
 
+# override default image php:7.2-cli
+image: harbor.containers.wurnet.nl/proxy-cache/library/php:7.4-cli
+
 # no deploy stage
 stages:
 - prepare