The Windows image is not covered, but you can learn more about it on the mssql-server-windows-developer Docker Hub page. This quickstart specifically focuses on using the SQL Server on Linux image. It can be used with the Docker Engine 1.8+ on Linux or on Docker for Mac/Windows. This image consists of SQL Server running on Linux based on Ubuntu 20.04.
If you prefer to create SQL Server 2017 containers, see the SQL Server 2017 version of this article. This quickstart creates SQL Server 2019 containers.