Dockerfile: Cannot add PPA: jonathonf

[0xKurt]

Step 4/11 : RUN add-apt-repository ppa:jonathonf/python-3.6 -y && apt-get update && apt-get install python3.6 -y && update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.5 1 && update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 2
---> Running in e3ede42fcce2
Cannot add PPA: 'ppa:~jonathonf/ubuntu/python-3.6'.
The user named '~jonathonf' has no PPA named 'ubuntu/python-3.6'
Please choose from the following available PPAs:

• 'ansible': Ansible
• 'atslang': ATS2 programming language
• 'backports': Backport collection
• 'barrier': Barrier
• 'bazel': Bazel
• 'byobu': Byobu
• 'calibre': Calibre
• 'clementine': Clementine
• 'compton': Compton
• 'cpan': Packaged CPAN modules
• 'debhelper': debhelper
• 'debhelper-10': debhelper 10
• 'debhelper-11': debhelper 11
• 'debhelper-12': debhelper 12
• 'debhelper-trusty': debhelper for trusty
  The command '/bin/sh -c add-apt-repository ppa:jonathonf/python-3.6 -y && apt-get update && apt-get install python3.6 -y && update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.5 1 && update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 2' returned a non-zero code: 1

possible solution (not fully tested yet): add-apt-repository ppa:deadsnakes/ppa instead of add-apt-repository ppa:jonathonf/python-3.6

[marwan2]

Same issue here, still not fixed