CI fixed with POSIX casing

.gitlab-ci.yml

@@ -9,8 +9,8 @@ nginx:
     name: gitlab-registry.cern.ch/ci-tools/docker-image-builder
     entrypoint: [""]
   script:
+    # Using POSIX string check since "[[]]" failed
     - |
-
       case "$CI_COMMIT_BRANCH" in
         v*) export DATE=`date -u +%Y.%m.%dT%H-%M-%SZ` ; export TAG="RELEASE"-${DATE} ;;
         *) export TAG=$CI_COMMIT_SHORT_SHA ;;
@@ -34,13 +34,12 @@ sitebuilder:
     name: gitlab-registry.cern.ch/ci-tools/docker-image-builder
     entrypoint: [""]
   script:
+    # Using POSIX string check since "[[]]" failed
     - |
-        if [[ "$CI_COMMIT_BRANCH" == "v"* ]]; then
-          export DATE=`date -u +%Y.%m.%dT%H-%M-%SZ`
-          export TAG=${TAG:-"RELEASE".$DATE}
-        else
-          export TAG=$CI_COMMIT_SHORT_SHA
-        fi
+      case "$CI_COMMIT_BRANCH" in
+        v*) export DATE=`date -u +%Y.%m.%dT%H-%M-%SZ` ; export TAG="RELEASE"-${DATE} ;;
+        *) export TAG=$CI_COMMIT_SHORT_SHA ;;
+      esac
     - wget --no-check-certificate https://github.com/mikefarah/yq/releases/download/v4.2.0/yq_linux_amd64 -O /yq && chmod +x /yq
     - export softwareVersions=$CI_PROJECT_DIR/images/softwareVersions
     - export phpVersion=`/yq e .php $softwareVersions`