Alpine Linux is a Linux distribution. The Alpine Linux Docker image looks like the smallest Docker image ever.
# Search the Alpine Docker image.docker search alpine
# Get the Alpine Docker image.docker pull alpine
# Start a Docker instance of the Alpine image.docker run -it alpine /bin/sh
# Inside the Alpine Docker instance, install necessary packages.# "apk" is a tool of Alpine Linux to manage packages.apk add --no-cache python
More information about Alpine Linux and Alpine Linux Docker image can be found from here and here.