Raise error is socket is **not** available

[BrunoGrandePhD]

I was working with the cwltool container image, and I was wondering if the intent with the cwltool-in-docker.sh entrypoint was to raise an error if both the Docker socket is unavailable and DOCKER_HOST is unset. I could be completely wrong, but I wanted to check just in case.

[codecov]

Codecov Report

Merging #1809 (2eeacf6) into main (c69221b) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1809      +/-   ##
==========================================
+ Coverage   83.55%   83.59%   +0.03%     
==========================================
  Files          44       44              
  Lines        8102     8102              
  Branches     2218     2218              
==========================================
+ Hits         6770     6773       +3     
+ Misses        851      849       -2     
+ Partials      481      480       -1     

Impacted Files	Coverage Δ
cwltool/workflow_job.py	87.42% <0.00%> (+0.56%)	⬆️

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[mr-c]

Thanks!

This was my error, introduced in 6b3e50b