Improve the Skaffold.dev documentation

[dgageot]

No description provided.

[codecov-io]

Codecov Report

Merging #1579 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master    #1579   +/-   ##
=======================================
  Coverage   46.51%   46.51%           
=======================================
  Files         118      118           
  Lines        5044     5044           
=======================================
  Hits         2346     2346           
  Misses       2464     2464           
  Partials      234      234

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/completion.go	0% <ø> (ø)	⬆️
cmd/skaffold/app/cmd/config.go	0% <0%> (ø)	⬆️
cmd/skaffold/app/cmd/config/list.go	0% <0%> (ø)	⬆️
cmd/skaffold/app/cmd/cmd.go	0% <0%> (ø)	⬆️
cmd/skaffold/app/cmd/config/set.go	61.11% <0%> (ø)	⬆️
cmd/skaffold/app/cmd/config/unset.go	9.52% <0%> (ø)	⬆️
cmd/skaffold/app/cmd/fix.go	46.66% <0%> (ø)	⬆️
pkg/skaffold/deploy/kubectl/version.go	0% <0%> (ø)	⬆️
cmd/skaffold/app/cmd/init.go	15.34% <0%> (ø)	⬆️
pkg/skaffold/schema/versions.go	65.85% <0%> (ø)	⬆️

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[container-tools-bot]

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