docker-compose file no longer building

[troyfolger]

Recreate:

$ git clone https://github.com/hbz/swib18-workshop.git
$ cd swib18-workshop
$ docker-compose -f docker-compose.yml up

[ ... ]

## Installing the NodeSource Node.js 8.x LTS Carbon repo...


## Populating apt-get cache...

+ apt-get update
Hit:1 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:2 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:4 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Reading package lists...

## Installing packages required for setup: lsb-release...

+ apt-get install -y lsb-release > /dev/null 2>&1

## Confirming "focal" is supported...

+ curl -sLf -o /dev/null 'https://deb.nodesource.com/node_8.x/dists/focal/Release'

## Your distribution, identified as "focal", is not currently supported, please contact NodeSource at https://github.com/nodesource/distributions/issues if you think this is incorrect or would like your distribution to be considered for support

ERROR: Service 'swibws' failed to build: The command '/bin/sh -c chmod 755 ./setup_8.x && ./setup_8.x' returned a non-zero code: 1