Feature/macosx (#44)

* Docker image for MacOSX

* Delete .github/workflows directory

* reinstantiated workflows; added one for OSX

* trying to work out env variables

* trying to work out env variables (take 2)

* resolving pip/pipx confusion

* g

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Co-authored-by: Fedor Batonogov <f.batonogov@yandex.ru>