Enable docker for CentOS >= 7 and Fedora >= 30

vars/Fedora-31.yml

@@ -0,0 +1,13 @@
+---
+# vars file for ensure_docker
+package_list:
+  - name: 'cockpit-docker'
+    state: 'present'
+  - name: 'docker-compose'
+    state: 'present'
+  - name: 'moby-engine'
+    state: 'present'
+service_list:
+  - name: 'docker.socket'
+    state: 'started'
+    enabled: 'yes'