Embed Platform in Image

This embeds the Platform struct in the image struct, so that these fields
don't have to be defined multiple times, and to allow projects that have
tooling for validating/normalizing/handling Platform data can apply these
on an image-config, without first constructing a Platform from these fields.

Signed-off-by: Sebastiaan van Stijn <[email protected]>

Author: thaJeztah

specs-go/v1/config.go

@@ -86,22 +86,8 @@ type Image struct {
 	// Author defines the name and/or email address of the person or entity which created and is responsible for maintaining the image.
 	Author string `json:"author,omitempty"`
 
-	// Architecture is the CPU architecture which the binaries in this image are built to run on.
-	Architecture string `json:"architecture"`
-
-	// Variant is the variant of the specified CPU architecture which image binaries are intended to run on.
-	Variant string `json:"variant,omitempty"`
-
-	// OS is the name of the operating system which the image is built to run on.
-	OS string `json:"os"`
-
-	// OSVersion is an optional field specifying the operating system
-	// version, for example on Windows `10.0.14393.1066`.
-	OSVersion string `json:"os.version,omitempty"`
-
-	// OSFeatures is an optional field specifying an array of strings,
-	// each listing a required OS feature (for example on Windows `win32k`).
-	OSFeatures []string `json:"os.features,omitempty"`
+	// Platform describes the platform which the image in the manifest runs on.
+	Platform
 
 	// Config defines the execution parameters which should be used as a base when running a container using the image.
 	Config ImageConfig `json:"config,omitempty"`