ci: remove alias with vars

.gitlab-ci.yml

@@ -40,7 +40,7 @@
 - mkdir -p ~/.ssh
 - chmod 700 ~/.ssh
 - alias scp="scp -o 'StrictHostKeyChecking no'"
-- alias ssh="ssh -o 'StrictHostKeyChecking no' $SSH_USER@$SSH_IP"
+- alias ssh="ssh -o 'StrictHostKeyChecking no'"
 
 cache:
   paths:
@@ -115,10 +115,10 @@ deploy-dev:
   script:
     - *ssh
     # remove the old version from dev and test
-    - ssh "rm -rf ~/$CI_COMMIT_REF_NAME/frontend/website/*"
-    - ssh "rm -rf ~/test/frontend/website/*"
+    - ssh $SSH_USER@$SSH_IP "rm -rf ~/$CI_COMMIT_REF_NAME/frontend/website/*"
+    - ssh $SSH_USER@$SSH_IP "rm -rf ~/test/frontend/website/*"
     - scp -r public/* $SSH_USER@$SSH_IP:~/$CI_COMMIT_REF_NAME/frontend/website/
-    - ssh "cp -r ~/$CI_COMMIT_REF_NAME/frontend/website/* ~/test/frontend/website/"
+    - ssh $SSH_USER@$SSH_IP "cp -r ~/$CI_COMMIT_REF_NAME/frontend/website/* ~/test/frontend/website/"
 
 # this stage creates a new environment for the current branch.
 pages: