Made the image name a shared const.

fn/common.go

@@ -14,6 +14,10 @@ import (
 	"gitlab.oracledx.com/odx/functions/fn/langs"
 )
 
+const (
+	functionsDockerImage = "treeder/functions"
+)
+
 func verbwriter(verbose bool) io.Writer {
 	// this is too limiting, removes all logs which isn't what we want
 	// verbwriter := ioutil.Discard

fn/start.go

@@ -44,7 +44,7 @@ func start(c *cli.Context) error {
 	for _, v := range denvs {
 		args = append(args, "-e", v)
 	}
-	args = append(args, "treeder/functions")
+	args = append(args, functionsDockerImage)
 	cmd := exec.Command("docker", args...)
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr

fn/update.go

@@ -20,7 +20,7 @@ func updateCmd() cli.Command {
 
 func update(c *cli.Context) error {
 	args := []string{"pull",
-		"treeder/functions:latest",
+		functionsDockerImage,
 	}
 	cmd := exec.Command("docker", args...)
 	cmd.Stdout = os.Stdout