Example
Grep cam images every 1 second
docker run -d --name download-loop -v /home/pi/cam:/opt/out -e EXT=jpg
-e USER=user -e PASSWD=password -e URL=http://192.168.1.169/tmpfs/auto.jpg
-e SLEEP=1 fabryprog/download-loop:arm
Continuously Download from URL
docker run -d --name download-loop -v /home/pi/cam:/opt/out -e EXT=jpg
-e USER=user -e PASSWD=password -e URL=http://192.168.1.169/tmpfs/auto.jpg
-e SLEEP=1 fabryprog/download-loop:arm
Continuously Download from URL
https://hub.docker.com/r/fabryprog/download-loop/