docker build --rm --tag ol-fetish:3.20.1 .
docker run --rm \
--user $(id -u):$(id -g) \
--volume $(pwd):/build \
ol-fetish:3.20.1 <config> <output>
Example
docker run --rm \
--user $(id -u):$(id -g) \
--volume $(pwd):/build \
ol-fetish:3.20.1 ol-custom.json ol-custom.js