You should consider upgrading via the 'pip install --upgrade pip' command.
$ echo $PATH
/home/gitlab-runner/builds/DPfEafLZ/0/sbilal/pythonapp/python3-virtualenv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
$ if [[ $CI_COMMIT_REF_NAME = master ]]; then # collapsed multi-line command
deploying to prod server
Failed to start prod.service: Interactive authentication required.
See system logs and 'systemctl status prod.service' for details.
section_end:1653933925:step_script
section_start:1653933925:cleanup_file_variables
Cleaning up project directory and file based variables
section_end:1653933925:cleanup_file_variables
ERROR: Job failed: exit status 1