Update docs to clarify when commands are run

[blampe]

Fixes #751

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 21 lines in your changes missing coverage. Please review.

Project coverage is 27.60%. Comparing base (1c07006) to head (e044353).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
provider/pkg/provider/common/inputs.go	0.00%	19 Missing ⚠️
provider/pkg/provider/local/run.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #789      +/-   ##
==========================================
- Coverage   27.80%   27.60%   -0.20%     
==========================================
  Files          24       24              
  Lines         982      989       +7     
==========================================
  Hits          273      273              
- Misses        662      669       +7     
  Partials       47       47              

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