Fix external renderers example (#12841)

* libffi-dev is required for building jupyter
* matplotlib can not be installed using wheels on the used version of alpine
  linux, which means it must be compiled and  a large number of other packages
  have to be installed as well.
  This is very inefficient: see eg.
  https://pythonspeed.com/articles/alpine-docker-python/

  Apart from that, matplotlib is actually not required for rendering
  notebook files in gitea and it will pull in other dependencies which take some
  time to build (ie numpy).
This commit is contained in:
Johan Van de Wauw 2020-09-15 00:11:11 +02:00 committed by GitHub
parent ed2bdf455c
commit 08a905f614
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@ -36,12 +36,12 @@ FROM gitea/gitea:{{< version >}}
COPY custom/app.ini /data/gitea/conf/app.ini
[...]
RUN apk --no-cache add asciidoctor freetype freetype-dev gcc g++ libpng python-dev py-pip python3-dev py3-pip py3-pyzmq
RUN apk --no-cache add asciidoctor freetype freetype-dev gcc g++ libpng libffi-dev python-dev py-pip python3-dev py3-pip py3-pyzmq
# install any other package you need for your external renderers
RUN pip3 install --upgrade pip
RUN pip3 install -U setuptools
RUN pip3 install jupyter matplotlib docutils
RUN pip3 install jupyter docutils
# add above any other python package you may need to install
```