Add flag to change workdir

[javiermtorres]

Closes #178

[codecov-commenter]

Codecov Report

❌ Patch coverage is 95.23810% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
encoderfile/src/build_cli/cli/build.rs	95.23%	1 Missing ⚠️

Files with missing lines	Coverage Δ
encoderfile/src/build_cli/cli/mod.rs	0.00% <ø> (ø)
encoderfile/src/build_cli/cli/build.rs	91.81% <95.23%> (+0.80%)	⬆️

... and 2 files with indirect coverage changes

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