Quick and dirty tool to 'sh' into any docker image
docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock fermayo/inspect <image>
For example:
$ docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock fermayo/inspect alpine:latest
/run/image # cat etc/os-release
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.5.2
PRETTY_NAME="Alpine Linux v3.5"
HOME_URL="http://alpinelinux.org"
BUG_REPORT_URL="http://bugs.alpinelinux.org"