add mkdocs.yml

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
:white_check_mark: +0.00% (target: -1.00%)	:white_check_mark: ∅

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (92cb82cc5b73648f541d208a92fc27ca2ce547a2) | 796 | 795 | 99.87% | | | Head commit (6164cbf6596ee692a9467c4844f5f2368a401313) | 796 (+0) | 795 (+0) | 99.87% (**+0.00%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#66) | 0 | 0 | **∅ (not applicable)** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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_{You may notice some variations in coverage metrics with the latest Coverage engine update. For more details, visit the documentation}