$ docker build -t $app_image_tag \ --build-arg APP_ENV=$app_env \ .
"docker build" requires exactly 1 argument.
See 'docker build --help'.

Usage:  docker build [OPTIONS] PATH | URL | -

Build an image from a Dockerfile
section_end:1774959057:step_script
section_start:1774959057:cleanup_file_variables
Cleaning up project directory and file based variables
section_end:1774959059:cleanup_file_variables
ERROR: Job failed: exit code 1