Dockerfile to demo youtube-dl thumbnail embedding

Dockerfile

FROM python:3

RUN mkdir /code
WORKDIR /code

RUN echo 'deb http://www.deb-multimedia.org jessie main non-free' >> /etc/apt/sources.list
RUN apt-get update
RUN yes | apt-get install deb-multimedia-keyring
RUN apt-get update
RUN apt-get install -y ffmpeg AtomicParsley
RUN git clone https://github.com/rg3/youtube-dl.git

ADD https://phihag.de/2018/so/ytdl_metathumb.py /code/youtube-dl/
RUN cd youtube-dl && python ytdl_metathumb.py
RUN AtomicParsley youtube-dl/*.mp4 -E
RUN mv youtube-dl/*artwork* artwork.jpg

CMD ["sleep 999999"]