docker build fails

[iemwill]

I am trying to build the docker image as described in artifacts/Dockerfiles/RSK-Node/ and am always getting at Step 7/11:

Step 7/11 : RUN   add-apt-repository -y ppa:rsksmart/rskj &&   apt-get update &&   (echo rskj shared/accepted-rsk-license-v1-1 select true | /usr/bin/debconf-set-selections )&&   apt-get install -y --no-install-recommends rskj &&   apt-get clean &&   rm -rf /var/lib/apt/lists/* &&   rm -f /etc/rsk/node.conf &&   ln -s /etc/rsk/regtest.conf /etc/rsk/node.conf
 ---> Running in 75cb63d64139
Hit:1 http://archive.ubuntu.com/ubuntu focal InRelease
Get:2 http://archive.ubuntu.com/ubuntu focal-updates InRelease [97.0 kB]
Ign:3 http://ppa.launchpad.net/rsksmart/rskj/ubuntu focal InRelease
Err:4 http://ppa.launchpad.net/rsksmart/rskj/ubuntu focal Release
  404  Not Found [IP: <IPaddress>]
Get:5 http://security.ubuntu.com/ubuntu focal-security InRelease [101 kB]
Hit:6 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Reading package lists...
E: The repository 'http://ppa.launchpad.net/rsksmart/rskj/ubuntu focal Release' does not have a Release file.
The command '/bin/sh -c add-apt-repository -y ppa:rsksmart/rskj &&   apt-get update &&   (echo rskj shared/accepted-rsk-license-v1-1 select true | /usr/bin/debconf-set-selections )&&   apt-get install -y --no-install-recommends rskj &&   apt-get clean &&   rm -rf /var/lib/apt/lists/* &&   rm -f /etc/rsk/node.conf &&   ln -s /etc/rsk/regtest.conf /etc/rsk/node.conf' returned a non-zero code: 100

the only other unnormal message from the terminal output is from step 5 after getting all the packages:

...
Get:214 http://archive.ubuntu.com/ubuntu focal/main amd64 software-properties-common all 0.98.9 [10.5 kB]
debconf: delaying package configuration, since apt-utils is not installed
Fetched 102 MB in 10s (9818 kB/s)
...

I have searched via google but found nothing promising/working to fix this. I am on Ubuntu 18.04.4 LTS with GNOME 3.28.2

[EthanHee]

@iemwill I get the same issue, have you fix it ?

[EthanHee]

change the baseimage to ubuntu:18.04 is fine.

[wangluen]

change base image from "FROM ubuntu:latest" to "FROM phusion/baseimage:0.10.2", and it works