Error during Install of Docker (using: curl -fsSL get.docker.com | sh)

Running Ubuntu 18.04 - I get the following error when trying to install Docker:

 curl -fsSL get.docker.com | sh
# Executing docker install script, commit: 442e66405c304fa92af8aadaa1d9b31bf4b0ad94
+ sh -c apt-get update -qq >/dev/null
E: The repository 'http://ppa.launchpad.net/webupd8team/unstable/ubuntu bionic Release' does not have a Release file.

Any ideas what is going wrong?

Thanks!

The problem is not related to the docker install
You must have an old/deprecated repo in your apt sources; try the following command to find out in which file (being root)
find /etc/apt/ -name "*.list" | xargs grep -H "http://ppa.launchpad.net/webupd8team/unstable/ubuntu"

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