__<ANSIBLE_USERNAME>__ -- Set a username for ansible. Example "ansible"
__<YOUR_PUBKEY>__ -- Paste your public key.
__UID_INT__ -- This is optional. By default it is set to 1600. It makes it easier to distinguish ansible user from the rest
### DockerEngineInstall.yml
The only thing to change here is __<CHANGE_HOSTS>__ at line 3. There you need to input IP of computers that ansible will run this playbook on.
## PS
In Proxmox if you have a VM template it is possible to paste multiple pubkeys. Go to template -> Cloud-Init -> SSH public key -> edit -> paste your pubkeys.