fix: tolower domain by default

[rfyiamcool]

summary

I think a lowercase domain name would be better.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (f70bf73) 89.04% compared to head (7bce56e) 89.04%.
Report is 1 commits behind head on main.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #32   +/-   ##
=======================================
  Coverage   89.04%   89.04%           
=======================================
  Files          12       12           
  Lines        1762     1762           
=======================================
  Hits         1569     1569           
  Misses        138      138           
  Partials       55       55           

Files Changed	Coverage Δ
internet.go	80.26% <100.00%> (ø)

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