The image contains feedmark ( https://catseye.tc/node/Feedmark ) and its dependencies (Python 3.5.7-slim-stretch, Markdown, atomize, BeautifulSoup4).

Example of use:

docker pull catseye/feedmark:0.11
docker run --user $(id -u):$(id -g) -i -t -v "${PWD}:/mnt/host" catseye/feedmark:0.11 \
    feedmark "eg/Ancient Llama Sightings.md" --output-atom feed.xml

This Docker image is fairly experimental. Please don't lean on it too heavily.

The -v "${PWD}:/mnt/host" option in the above bind-mounts the current directory on the host to the working directory in the container. This lets you give filenames as usual on the feedmark command line, so long as they reside somewhere under the current directory on the host. If you want anything more sophisticated than that, you'll have to establish more bind-mounts and translate paths between host and container as your needs dictate.