chore(gitlab-ci): fix relative paths

.gitlab-ci.yml

@@ -215,7 +215,7 @@ yesod:test:
 deploy:uniworx4:
   stage: deploy
   script:
-    - ssh -i .ssh/id root@uniworx4.ifi.lmu.de <bin/uniworx
+    - ssh -i ~/.ssh/id root@uniworx4.ifi.lmu.de <bin/uniworx
   needs:
     - yesod:build
     - yesod:test # For sanity
@@ -223,8 +223,7 @@ deploy:uniworx4:
   before_script:
     - apt-get update -y
     - apt-get install -y --no-install-recommends openssh-client
-    - mkdir -p ~/.ssh
-    - chmod 700 ~/.ssh
+    - install -m 0700 -d ~/.ssh
     - install -m 0644 ${SSH_KNOWN_HOSTS} ~/.ssh/known_hosts
     - install -m 0400 ${SSH_PRIVATE_KEY_UNIWORX4} ~/.ssh/id
   dependencies: