fix: reduce default max instances to 10 to stop cpu instance error

[HomelessDinosaur]

Closes #547

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4c00476) 57.28% compared to head (cbc0c3b) 57.30%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #548      +/-   ##
===========================================
+ Coverage    57.28%   57.30%   +0.01%     
===========================================
  Files           54       54              
  Lines         5155     5155              
===========================================
+ Hits          2953     2954       +1     
  Misses        2009     2009              
+ Partials       193      192       -1     

Flag	Coverage Δ
aws	59.04% <ø> (+0.07%)	⬆️
azure	61.61% <ø> (ø)
core	60.90% <ø> (ø)
gcp	45.21% <ø> (ø)

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