Move documentation to the project's repository

[oleg-nenashev]

Summary

Currently we have duplication of docs between README and the project's website, and I doubt it would be good in the future. To avoid consistency issues, I would propose to follow the documentation-as-code approach and put all the image-specific documentation under the repository, and just have a bare minimum on the website. Later we can implmenet importing documentation from the repository to the website.

References

• https://wiremock.org/docs/docker/