Switch to docker-ce repository

Change-Id: I2bac55cd767e7879f76df7c58e3f9a603bcefb6b
diff --git a/linux/system/repo/docker.yml b/linux/system/repo/docker.yml
index c527aa8..bb36728 100644
--- a/linux/system/repo/docker.yml
+++ b/linux/system/repo/docker.yml
@@ -3,7 +3,6 @@
     system:
       repo:
         docker:
-          source: "deb https://apt.dockerproject.org/repo ubuntu-${_param:linux_system_codename} main"
+          source: 'deb [arch=amd64] https://download.docker.com/linux/ubuntu/ ${_param:linux_system_codename} stable'
           architectures: amd64
-          key_id: 58118E89F3A912897C070ADBF76221572C52609D
-          key_server: keyserver.ubuntu.com
+          key_url: https://download.docker.com/linux/ubuntu/gpg