Enforce AUTODEPLOY_TO_PROD and PUBLISH_ON_PROD as boolean variables

templates/gitlab-ci-docker.yml

@@ -689,13 +689,12 @@ docker-publish:
     - if: '$CI_COMMIT_REF_NAME !~ $PROD_REF'
       when: never
     # exclude if $PUBLISH_ON_PROD disabled
-    - if: '$PUBLISH_ON_PROD == "false" || $PUBLISH_ON_PROD == "no" || $PUBLISH_ON_PROD == ""'
+    - if: '$PUBLISH_ON_PROD != "true"'
       when: never
     # exclude if snapshot is same as release image
     - if: '$DOCKER_SNAPSHOT_IMAGE == $DOCKER_RELEASE_IMAGE'
       when: never
     # if $AUTODEPLOY_TO_PROD: auto
-    - if: $AUTODEPLOY_TO_PROD
+    - if: '$AUTODEPLOY_TO_PROD == "true"'
     # else: manual + blocking
-    - if: $PUBLISH_ON_PROD # this 'if' is useless but only prevents GitLab warning :(
-      when: manual
+    - when: manual