`platform` String or Map Operating system and architecture (formatted as `[os]/[arch]`) to pass with `docker build --platform`. For example, `linux/arm64` or `windows/x86_64`. The default is `linux/x86_64`. Override the generated string to build with a different valid `osfamily` or `architecture`. For example, Windows users might change the string ```yaml platform: windows/x86_64 ``` which defaults to `WINDOWS_SERVER_2019_CORE`, using a map: ```yaml platform: osfamily: windows_server_2019_full architecture: x86_64 ``` ```yaml platform: osfamily: windows_server_2022_core architecture: x86_64 ``` ```yaml platform: osfamily: windows_server_2022_full architecture: x86_64 ```