Official docker image for CI

[jimafisk]

https://hub.docker.com/orgs/plentico

Should use lightweight container based on Alpine for quick CI builds:

Alpine Linux is... designed for security, simplicity, and resource efficiency... Because of its small size, it is commonly used in containers providing quick boot-up times.

Ideally it will only have the Plenti binary on it (once node dependency is removed per #3)

[jimafisk]

Using scratch instead of alpine will produce a smaller image: https://medium.com/@chemidy/create-the-smallest-and-secured-golang-docker-image-based-on-scratch-4752223b7324

We'll use goreleaser to automatically push to dockerhub: https://goreleaser.com/customization/docker/

Every new release will get it's own image tagged with that version, and the :latest tag will get updated: https://goreleaser.com/customization/docker/#keeping-docker-images-updated-for-current-major

The image will not have npm on it by default, which will work in the future for standard builds. If folks have extended the node_modules, or changed the versions of anything included with plenti core, this will be reflected in package.lock, but you will need to add a build step to your CI manually to npm install or plenti will build using defaults contained in the binary.

[jimafisk]

Use Goreleaser as model:

• .goreleaser.yml: https://github.com/goreleaser/goreleaser/blob/master/.goreleaser.yml#L32
• authenticate to hub.docker.com: https://github.com/goreleaser/goreleaser/blob/master/scripts/entrypoint.sh
• Dockerhub: https://hub.docker.com/u/goreleaser

[jimafisk]

Here's the dockerhub repo: https://hub.docker.com/repository/docker/plentico/plenti

Get the latest image: docker pull plentico/plenti:latest

Or get a specific version: docker pull plentico/plenti:v0.1.26 <- note this specific version won't work since nodejs is still required but not packaged with the image.