Bump to Docker CE 18.03

Ian Campbell · Ian Campbell · commit 72dd5d542478 · 2018-04-06T11:44:30.000+01:00
Signed-off-by: Ian Campbell &lt;ijc@docker.com&gt;
diff --git a/yml/docker.yml b/yml/docker.yml
@@ -1,6 +1,6 @@
 services:
   - name: docker
-    image: docker:17.12.0-ce-dind
+    image: docker:18.03.0-ce-dind
     capabilities:
      - all
     pid: host
