Blog post: Docker pipeline as code

This repository goes alongside the blog post Docker multistage builds: a minimal pipeline-as-code

It contains a number of subdirectories:

1. An "01-initial" directory, which contains an example of how you might begin: a Makefile which builds a Go binary and then packages it into a Docker image for later use. You don't have to use make for this, it's just an assistant.

   Of course, this requires that you have Go installed, and all the other relevant dependencies, and that they're all of an appropriate version.

2. An "02-build-and-test" directory, which contains an example of how you could bundle the build-test-package process into a single Docker image, removing the reliance on having the right version of Go and so forth installed.

   The resulting image has the service binary, plus all the build-time dependencies, and is quite large.

3. An "03-build-test-runtime" directory, which extends the build-and-test Dockerfile and creates a working Docker image with the built binary ready to go, in a minimal-sized final image

4. An "04-complete" directory, which demonstrates combining multiple Docker images into a single, minimised final image

It uses https://github.com/cevoaustralia/utcservice as a simple tiny microservice example