workflow fix ssh forwarding

.github/workflows/continuous-deployment.yml

@@ -40,11 +40,7 @@ jobs:
 
     - name: Deploy to Linode
       if: ${{ success() }}
-      env:
-        SSH_AUTH_SOCK: /tmp/ssh_agent.sock
       run: |
         eval "$(ssh-agent -s)"
-        echo "${{ secrets.SSH_PRIVATE_KEY }}" > /tmp/deploy_key
-        chmod 600 /tmp/deploy_key
-        ssh-add /tmp/deploy_key
+        echo "${{ secrets.SSH_PRIVATE_KEY }}" | ssh-add -
         ssh -o "StrictHostKeyChecking no" -A [email protected] 'cd /var/www/html/ && git pull origin main && systemctl restart gunicorn && systemctl restart nginx && gunicorn main:app --bind 0.0.0.0'