A batch converter for HEIC/HEIF images created on iOS 11 devices
Docker image available here: https://hub.docker.com/r/wshelley/heic-to-jpeg/
The following command will convert all HEIC images in the mounted volume specified:
docker run -v /path/to/convert/:/convert/ wshelley/heic-to-jpeg
Based on https://github.com/monostream/tifig