Flag to ignore missing env files

[aksiksi]

Fixes #8.

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (c044431) 70.13% compared to head (33e9bba) 70.39%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
main.go	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main       #9      +/-   ##
==========================================
+ Coverage   70.13%   70.39%   +0.25%     
==========================================
  Files           6        6              
  Lines         740      743       +3     
==========================================
+ Hits          519      523       +4     
  Misses        189      189              
+ Partials       32       31       -1     

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