In the case of Ubuntu 20.04, PKE installation via vagrant will fail if docker container runtime is used.

[Peter Balogh]

Describe the bug
Using ubuntu-single-docker.sh script, the installation failed in the case of Ubuntu 20.04.

Steps to reproduce the issue:
Run ./ubuntu-single-docker.sh

Expected behavior
The installation should be completed successfully

Additional context

    ubuntu-docker: E
    ubuntu-docker: :
    ubuntu-docker: Version '1.2.13-1' for 'containerd.io' was not found
    ubuntu-docker: E
    ubuntu-docker: :
    ubuntu-docker: Version '5:19.03.8~3-0~ubuntu-focal' for 'docker-ce' was not found
    ubuntu-docker: E
    ubuntu-docker: :
    ubuntu-docker: Version '5:19.03.8~3-0~ubuntu-focal' for 'docker-ce-cli' was not found
    ubuntu-docker: /tmp/vagrant-shell: line 20: /etc/docker/daemon.json: No such file or directory
    ubuntu-docker: Failed to restart docker.service: Unit docker.service not found.
The SSH command responded with a non-zero exit status. Vagrant
assumes that this means the command failed. The output for this command
should be in the log above. Please read the output to determine what
went wrong.