fix(ci): add missing ssh authentication

.gitlab-ci.yml

@@ -9,6 +9,13 @@ deploy_job:
 
   before_script:
     - 'which ssh-agent || (apk update && apk add curl openssh-client git grep)'
+    - eval $(ssh-agent -s)
+    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add - > /dev/null
+    - echo "$GH_PRIVATE_KEY" | tr -d '\r' | ssh-add - > /dev/null
+    - mkdir -p ~/.ssh
+    - chmod 700 ~/.ssh
+    - echo "$SSH_KNOWN_HOSTS" > ~/.ssh/known_hosts
+    - chmod 644 ~/.ssh/known_hosts
 
   script:
     - sh script.sh