Raspberry PI buster + docker = not working

Hi,

I wanted to install nprobe inside a docke container on my pi. However, I'm running into some installation issues.

Original dockerfile: https://github.com/ntop/docker-ntop/blob/master/Dockerfile.nprobe

FROM ubuntu:18.04
MAINTAINER ntop.org

RUN apt-get update && \
   apt-get -y -q install wget lsb-release gnupg && \
   # wget -q http://apt-stable.ntop.org/16.04/all/apt-ntop-stable.deb && \ ## =====> this will not work since it's not arm. So replaced it with the below line:
  wget http://packages.ntop.org/RaspberryPI/apt-ntop_1.0.190416-469_all.deb && \
   dpkg -i apt-ntop_1.0.190416-469_all.deb && \
   apt-get clean all

RUN apt-get update && \
   apt-get -y install nprobe 

RUN echo '#!/bin/bash\nnprobe "$@"' > /run.sh && \
   chmod +x /run.sh

ENTRYPOINT ["/run.sh"]

During the build process, while running this command: dpkg -i apt-ntop_1.0.190416-469_all.deb there is a failure:

Preparing to unpack apt-ntop_1.0.190416-469_all.deb ...
Unpacking apt-ntop (1.0.190416-469) ...
Setting up apt-ntop (1.0.190416-469) ...
Adding ntop key to apt keyring
Warning: apt-key should not be used in scripts (called from postinst maintainerscript of the package apt-ntop)
OK
Hit:1 http://ports.ubuntu.com/ubuntu-ports bionic InRelease
Hit:2 http://ports.ubuntu.com/ubuntu-ports bionic-updates InRelease            
Hit:3 http://ports.ubuntu.com/ubuntu-ports bionic-backports InRelease          
Hit:5 http://ports.ubuntu.com/ubuntu-ports bionic-security InRelease
Ign:4 http://packages.ntop.org/apt/bionic_pi armhf/ InRelease                                         
Ign:6 http://packages.ntop.org/apt/bionic_pi all/ InRelease                     
Err:7 http://packages.ntop.org/apt/bionic_pi armhf/ Release              
  404  Not Found [IP: 167.99.215.164 80]
Err:8 http://packages.ntop.org/apt/bionic_pi all/ Release
  404  Not Found [IP: 167.99.215.164 80]
Reading package lists... Done
E: The repository 'http://apt.ntop.org/bionic_pi armhf/ Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://apt.ntop.org/bionic_pi all/ Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
dpkg: error processing package apt-ntop (--install):
 installed apt-ntop package post-installation script subprocess returned error exit status 100
Errors were encountered while processing:
 apt-ntop

How do I fix this issue?

Thanks.

Start with Dockerfile.nprobe and reproduce the dpkg -i apt-ntop_1.0.190416-469_all.deb step in the reported Raspberry Pi environment. Inspect the repository setup exposed by the failure and verify whether the required armhf and all Release files are available; done means the image builds and nprobe installs successfully.