chore: switch logging to slog

[vgarvardt]

No description provided.

[codecov]

Codecov Report

Merging #111 (75e6d30) into master (5d44955) will increase coverage by 1.16%.
The diff coverage is 34.04%.

@@            Coverage Diff             @@
##           master     #111      +/-   ##
==========================================
+ Coverage   48.83%   50.00%   +1.16%     
==========================================
  Files          23       23              
  Lines         731      714      -17     
==========================================
  Hits          357      357              
+ Misses        343      327      -16     
+ Partials       31       30       -1     

Files	Coverage Δ
pkg/loader/loader.go	72.72% <100.00%> (ø)
pkg/storage/storage.go	54.54% <ø> (ø)
pkg/storage/storage_memory.go	96.15% <100.00%> (ø)
pkg/server/renderer/renderer.go	0.00% <0.00%> (ø)
pkg/server/server.go	0.00% <0.00%> (ø)
pkg/loader/loader_file.go	47.82% <66.66%> (ø)
pkg/server/config.go	26.31% <0.00%> (+7.79%)	⬆️
pkg/server/renderer/html.go	14.10% <23.80%> (+0.35%)	⬆️