SCRUM#509: Add CI runner with lint stage

1 job for issue/509 in 2 minutes and 39 seconds (queued for 8 seconds)
Name Stage Failure
failed
lint_shell Lint
                                                                     ^-- SC2128: Expanding an array without an index only gives the first element.


In ./common.sh line 59:
echo "if test \$? -ne 0; then perror ${BASH_SOURCE[1]}: line ${BASH_LINENO} $*; /bin/bash;fi"
^-- SC2128: Expanding an array without an index only gives the first element.

Understand errors in:
https://github.com/koalaman/shellcheck/wiki
ERROR: Job failed: exit code 1