jq v1.4 Docker image based on BusyBox, just over 6MB in size.

Test jq command:

$ docker run --rm --name jq realguess/jq:1.4 \
  sh -c 'echo "{\"foo\":\"bar\"}" | jq .'
{
  "foo": "bar"
}

Start an interactive container with jq:

$ docker run -it --rm --name jq realguess/jq:1.4

This will drop into /bin/sh, then jq command can be run:

# jq