Add Docker files

- untested
- create bionic build environment, run travis on bionic, build on wine +
  run travis under wine

docker/bionic-buildenv.docker

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+FROM ubuntu:bionic
+
+ENV DEBIAN_FRONTEND noninteractive
+
+RUN dpkg --add-architecture i386
+
+RUN apt-get update
+
+# travis xenial bionic
+RUN apt-get install -yq --no-install-suggests --no-install-recommends \
+    python-setuptools libssl-dev python-dev python-virtualenv python-pip
+
+# travis focal
+RUN apt-get install -yq --no-install-suggests --no-install-recommends \
+    python-setuptools libssl-dev python-dev python3-virtualenv python3-pip
+
+# dpkg
+RUN apt-get install -yq --no-install-suggests --no-install-recommends \
+   python-minimal python-setuptools python-all python openssl libssl-dev \
+   dh-apparmor debhelper dh-python python-msgpack python-qt4 git python-stdeb \
+   python-all-dev
+
+# Code quality
+RUN apt-get install -yq --no-install-suggests --no-install-recommends \
+    pylint python-pycodestyle python3-pycodestyle pycodestyle python-flake8 \
+    python3-flake8 flake8 python-pyflakes python3-pyflakes pyflakes pyflakes3 \
+    curl
+
+# Wine32
+RUN apt-get install -yq --no-install-suggests --no-install-recommends \
+    python python-pip wget wine-stable winetricks mingw-w64 wine32 wine64 xvfb
+
+# Wine64
+RUN apt-get install -yq --no-install-suggests --no-install-recommends \
+    python python-pip wget wine-stable winetricks mingw-w64 wine32 wine64 xvfb
+
+# Buildbot
+RUN apt-get install -yq --no-install-suggests --no-install-recommends \
+    buildbot-slave
+
+# travis2bash
+RUN wget -O /usr/local/bin/travis2bash.sh https://storage.bitmessage.org/travis2bash.sh
+RUN chmod a+x /usr/local/bin/travis2bash.sh
+
+RUN useradd -ms /bin/bash pool
+
+RUN echo 'pool ALL=ALL NOPASSWD:ALL' >> /etc/sudoers
+

docker/bionic-travis.docker

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+FROM pybm-build
+
+USER pool
+
+WORKDIR $HOME
+RUN git clone https://github.com/Bitmessage/PyBitmessage
+
+WORKDIR $HOME/PyBitmessage
+ENV PATH $HOME/.local/bin:$PATH
+
+RUN pip install -r requirements.txt
+RUN ln -s src pybitmessage
+RUN python setup.py install --user
+RUN python checkdeps.py
+RUN xvfb-run src/bitmessagemain.py -t
+RUN python setup.py test

docker/bionic-wine.docker

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+FROM pybm-build
+
+USER pool
+
+
+RUN mkdir $HOME/Downloads
+WORKDIR $HOME/Downloads
+RUN wget https://download.microsoft.com/download/7/9/6/796EF2E4-801B-4FC4-AB28-B59FBF6D907B/VCForPython27.msi
+
+WORKDIR $HOME
+RUN git clone https://github.com/Bitmessage/PyBitmessage
+
+WORKDIR $HOME/PyBitmessage
+ENV PATH $HOME/.local/bin:$PATH
+RUN ln -s src pybitmessage
+
+# 64b
+RUN xvfb-run buildscripts/winbuild.sh
+ENV WINEPREFIX $HOME/.wine64
+ENV WINEARCH=win64
+RUN xvfb-run wine msiexec -i $HOME/Downloads/VCForPython27.msi /q /norestart
+RUN xvfb-run winetricks -q dotnet40
+RUN xvfb-run wine pip install wheel
+RUN xvfb-run wine python setup.py test
+
+# 32b
+RUN xvfb-run i386 buildscripts/winbuild.sh
+ENV WINEPREFIX $HOME/.wine32
+ENV WINEARCH=wine32
+RUN xvfb-run i386 wine msiexec -i $HOME/Downloads/VCForPython27.msi /q /norestart
+RUN xvfb-run i386 winetricks -q dotnet40
+RUN xvfb-run i386 wine pip install wheel
+RUN xvfb-run i386 wine python setup.py test