Merge branch 'preprod' into 'master'

Update .gitlab-ci.yml

See merge request lqdn-interne/don!40

.gitlab-ci.yml

@@ -83,6 +83,7 @@ job deploy:
   environment: production
   variables:
     PHINX_ENVIRONMENT: "production"
+    PROD_HOME: "$PROD_HOME"
   script:
     - chmod a+x ci/install.sh
     - ./ci/install.sh