[How to do instruction] LCD/OLED display using pydPiper

[Battum]

Hello there, I'm new to this and trying to get Moode up and running on Raspberry Pi4B 4Gb.
Its working ok (version 7.4.1) and now I'm in for getting my 20x4 display to work using the software\/commands provided here:

cd /home/pi

git clone https://github.com/dhrone/pydPiper
cd pydPiper
sudo ./install_docker.sh

After the last command I get:

Installing Docker from the convenience script

# Executing docker install script, commit: 93d2499759296ac1f9c510605fef85052a2c32be

+ sh -c apt-get update -qq >/dev/null

E: Repository 'http://raspbian.raspberrypi.org/raspbian buster InRelease' changed its 'Suite' value from 'stable' to 'oldstable'

Enabling docker

Failed to enable unit: Unit file docker.service does not exist.

Failed to start docker.service: Unit docker.service not found.

sudo: docker: command not found

Testing docker

[i]sudo: docker: command not found[/i]



So where does this go wrong? And how to fix this?

Thanks for the help!