Fix IP detection in WSL2 environments

[trevor-vaughan]

No description provided.

[codecov]

Codecov Report

Merging #56 (f440101) into master (6967654) will increase coverage by 0.10%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #56      +/-   ##
==========================================
+ Coverage   83.83%   83.94%   +0.10%     
==========================================
  Files           1        1              
  Lines         297      299       +2     
==========================================
+ Hits          249      251       +2     
  Misses         48       48              

Impacted Files	Coverage Δ
lib/beaker/hypervisor/docker.rb	83.94% <100.00%> (+0.10%)	⬆️

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