Merge pull request #707 from unclejack/411-add-arch-field

411 add architecture field

graph.go

@@ -107,6 +107,7 @@ func (graph *Graph) Create(layerData Archive, container *Container, comment, aut
 		DockerVersion: VERSION,
 		Author:        author,
 		Config:        config,
+		Architecture:  "x86_64",
 	}
 	if container != nil {
 		img.Parent = container.Image

image.go

@@ -27,6 +27,7 @@ type Image struct {
 	DockerVersion   string    `json:"docker_version,omitempty"`
 	Author          string    `json:"author,omitempty"`
 	Config          *Config   `json:"config,omitempty"`
+	Architecture    string    `json:"architecture,omitempty"`
 	graph           *Graph
 }