Building the smallest possible Docker image (based on nginx:stable-alpine) to deploy a static Jekyll website

jekyll build
docker build -t my-site .
docker run -it -p 8080:80 my-site

Open http://localhost:8080 in your browser.

The resulting image contains only nginx and the HTML code. No Ruby, no build stuff - ready to ship to your Docker host.

Look at the image size:

$ docker images | grep my-site
my-site   latest   9d3ab37ef5d8   3 seconds ago   22.7MB