How to create a Docker container GitHub Action to provide executable for the main workflow?

I want to implement my own Docker GitHub Action that should provide an executable called my-tool which I can use in my workflows. Ideally, I want to be able to write the following config in my workflow:

- name: Setup My Tool
  uses: actions/my-tool@v1
- name: Run My Tool
  run: my-tool --option1 --option2 arg1 arg2

My custom action that provides my-tool is responsible for creating the my-tool executable (either by downloading it or building from sources). And I want my action to make this executable available within the rest of my workflow. However, I can't find any way to copy my executable from the docker container back to host that runs my action. How can I transfer my-tool from the Docker GitHub Action to my workflow?