This image is a base image for Iron.io's set of tiny images. Currently, it's just the alpine OS image.

First, be sure to get the latest alpine:

docker pull alpine
docker pull alpine:edge

Then build it:

docker build -t iron/base:latest --no-cache .

Tag it with Alpine version, run docker run --rm iron/base cat /etc/os-release to check version.

docker tag iron/base:latest iron/base:X.Y.Z

Push:

docker push iron/base