Update shell error handling for make-combine-installer.sh

[jmgrady]

Add set -eo pipefail to make-combine-installer.sh so that the script stops if any command or command in a pipe returns an error.

This is to address the case where the script is run without the docker daemon running. It will complete with only the k3s images included; the ingress-nginx and The Combine images will be missing from the final package.

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This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.54%. Comparing base (ed7de44) to head (910276d).
Report is 33 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3291      +/-   ##
==========================================
- Coverage   74.63%   74.54%   -0.09%     
==========================================
  Files         279      279              
  Lines       10683    10683              
  Branches     1289     1289              
==========================================
- Hits         7973     7964       -9     
- Misses       2349     2356       +7     
- Partials      361      363       +2     

Flag	Coverage Δ
backend	83.79% <ø> (-0.19%)	⬇️
frontend	66.43% <ø> (ø)

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[imnasnainaec]

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @jmgrady)