Variables are hashes not lists

.gitlab-ci.yml

@@ -3,9 +3,9 @@ stages:
 
 preprod:deploy:
     variables:
-        - PREPROD: "True"
-        - WPCLI_PATH: "/usr/local/bin/wp-cli.phar"
-        - WP_PATH: "/srv/wordpress/"
+        PREPROD: "True"
+        WPCLI_PATH: "/usr/local/bin/wp-cli.phar"
+        WP_PATH: "/srv/wordpress/"
     stage: preprod
     tags: 
         - preprod