Merge branch '8-install-apt-transport-https-before-installing-any-other-package' into 'master'

Resolve "Install apt-transport-https before installing any other package"

Closes #8

See merge request openappstack/bootstrap!6

ansible/roles/prepare_node/tasks/docker.yml

 ---
 
+- name: Install some apt dependencies
+  apt:
+    name:
+      - "apt-transport-https"
+  become: true
+
 - name: Install docker apt repo key
   apt_key:
     url: "https://download.docker.com/linux/ubuntu/gpg"