Use xenial image id directly / Use default image's bootscript

Author: Hugues Morisset

README.md

@@ -102,7 +102,7 @@ You need to configure your `ACCESS_KEY` and `TOKEN`, we suggest you to install [
 In the following example, authentication is done without any other dependencies using the `--scaleway-token=TOKEN` and `--scaleway-organization=ACCESS_KEY` parameters.
 
 ```console
-$ docker-machine create -d scaleway --scaleway-token=TOKEN --scaleway-organization=ACCESS_KEY --scaleway-name="cloud-scaleway-1" cloud-scaleway
+$ docker-machine create -d scaleway --scaleway-token=TOKEN --scaleway-organization=ORGANIZATION_ID --scaleway-name="cloud-scaleway-1" cloud-scaleway
 Running pre-create checks...
 Creating machine...
 (cloud-scaleway) Creating SSH key...

driver/scaleway.go

@@ -24,8 +24,8 @@ import (
 const (
 	// VERSION represents the semver version of the package
 	VERSION           = "v1.4"
-	defaultImage      = "ubuntu-xenial"
-	defaultBootscript = "x86_64 mainline 4.4.127 rev1"
+	defaultImage      = "265b32a3"
+	defaultBootscript = ""
 )
 
 var scwAPI *api.ScalewayAPI