fix #14: negotiate docker client version

container/docker_build.go

@@ -33,6 +33,7 @@ func NewDockerBuildExecutor(input NewDockerBuildExecutorInput) common.Executor {
 		if err != nil {
 			return err
 		}
+		cli.NegotiateAPIVersion(input.Ctx)
 
 		input.Logger.Debugf("Building image from '%v'", input.ContextDir)
 

container/docker_pull.go

@@ -31,6 +31,7 @@ func NewDockerPullExecutor(input NewDockerPullExecutorInput) common.Executor {
 		if err != nil {
 			return err
 		}
+		cli.NegotiateAPIVersion(input.Ctx)
 
 		reader, err := cli.ImagePull(input.Ctx, imageRef, types.ImagePullOptions{})
 		input.logDockerResponse(reader, err != nil)

container/docker_run.go

@@ -41,6 +41,7 @@ func NewDockerRunExecutor(input NewDockerRunExecutorInput) common.Executor {
 		if err != nil {
 			return err
 		}
+		cli.NegotiateAPIVersion(input.Ctx)
 
 		// check if container exists
 		containerID, err := findContainer(input, cli, input.Name)