<details><summary>99f607a Make image more usable in CI environments</summary>
* Improve caching by just copying essential files for each stage
* Group RUN commands in as few layers as possible
* Use `poetry==1.0.0b5`, which allows avoiding the installation of the local package
* Generate `schemathesis` comand, globally accessible
* Use whitelist approach for `.dockerignore`
</details>
8c7ba2d add publish to pypi.org on release.