dev: resilient gateway build for dev front

[ElysaSrc]

When building the Gateway in development, if the front is broken we should not fail since it can happens a lot for front-end developers.

Should be tested by front-end dev to see if it fits their development workflows.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.93%. Comparing base (b443b6a) to head (271f076).
Report is 5 commits behind head on dev.

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #10732      +/-   ##
==========================================
- Coverage   81.93%   81.93%   -0.01%     
==========================================
  Files        1078     1078              
  Lines      107544   107544              
  Branches      733      733              
==========================================
- Hits        88115    88114       -1     
- Misses      19390    19391       +1     
  Partials       39       39              

Flag	Coverage Δ
editoast	74.39% <ø> (-0.01%)	⬇️
front	89.41% <ø> (ø)
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.50% <ø> (ø)
tests	88.14% <ø> (ø)

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[emersion]

Hm, maybe we can just completely skip the front build in that case, instead of trying it and ignoring errors?

[ElysaSrc]

Hm, maybe we can just completely skip the front build in that case, instead of trying it and ignoring errors?

Guess we could, no strong opinion on that. I'll let front developers go one way or another since I will not be available for this (feel free to modify the branch as you please).

[Khoyo]

lgtm

[ElysaSrc]

@emersion I've followed what you've suggested, I will merge it so there will be less issues for developers going forward.