chore(gitlab-ci): experiment with deployment to uniworx4

.gitlab-ci.yml

@@ -224,12 +224,12 @@ deploy:uniworx4:
   before_script:
     - apt-get update -y
     - apt-get install -y --no-install-recommends openssh-client
-    - eval $(ssh-agent -s)
-    - "ssh-add - <${SSH_PRIVATE_KEY_UNIWORX4}"
     - mkdir -p ~/.ssh
     - chmod 700 ~/.ssh
-    - cp ${SSH_KNOWN_HOSTS} ~/.ssh/known_hosts
-    - chmod 644 ~/.ssh/known_hosts
+    - install -m 0644 ${SSH_KNOWN_HOSTS} ~/.ssh/known_hosts
+    - install -m 0400 ${SSH_PRIVATE_KEY_UNIWORX4} ~/.ssh/id
+    - eval $(ssh-agent -s)
+    - ssh-add ~/.ssh/id
   dependencies:
     - yesod:build