4
RUN sed -i s#://deb.debian.org#://cdn-fastly.deb.debian.org# /etc/apt/sources.list \
6
&& adduser --home /home/travis travis --quiet --disabled-login --gecos "" --uid 1000 \
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&& env DEBIAN_FRONTEND=noninteractive apt-get build-dep -y /tmp \
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&& env DEBIAN_FRONTEND=noninteractive apt-get install -y ccache python3-pip \
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&& python3 -m pip install -U mypy \