FROM python:3 WORKDIR /opt RUN pip install -U Pillow==5.4.1 idna==2.8 requests==2.21.0 urllib3==1.24.1 RUN pip install pycairo RUN pip install git+https://github.com/googlefonts/gftools RUN pip install fontmake RUN apt-get update && \ apt-get install -y ttfautohint && \ apt-get install -y woff2 && \ apt-get install -y sfnt2woff-zopfli RUN pip install fontbakery