SCRUM#509: Add CI runner with lint stage

1 job for issue/509 in 3 minutes and 29 seconds
Name Stage Failure
failed
lint_shell Lint
Cloning repository...
Cloning into '/builds/le6/create-iso'...
Checking out f39a39a3 as issue/509...
Skipping Git submodules setup
$ ./.linter_shell.sh
grep: package: No such file or directory
xargs: shellcheck: No such file or directory
Understand errors in:
https://github.com/koalaman/shellcheck/wiki
ERROR: Job failed: exit code 1