Add docker client

api/models/docker.go

@@ -0,0 +1,18 @@
+package models
+
+import (
+	"github.com/docker/docker/client"
+)
+
+var cli *client.Client
+
+func DockerApi() *client.Client {
+	if cli == nil {
+		var err error
+		cli, err = client.NewClientWithOpts(client.FromEnv)
+		if err != nil {
+			panic(err)
+		}
+	}
+	return cli
+}