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Gateway, for creatives

Purpose

This repository is meant to blossom into custom Universal Blue image tailored for creatives. This Project naturally falls into the same family of other Universal Blue systems, such as;

Warning

Everything below this message is boilerplate stuff that came with the template, Please ignore for now as it all WILL be changed.

Prerequisites

Working knowledge in the following topics:

Containerfile

This file defines the operations used to customize the selected image. It contains examples of possible modifications, including how to:

  • change the upstream from which the custom image is derived
  • add additional RPM packages
  • add binaries as a layer from other images

Workflows

build.yml

This workflow creates your custom OCI image and publishes it to the Github Container Registry (GHCR). By default, the image name will match the Github repository name.

Container Signing

Container signing is important for end-user security and is enabled on all Universal Blue images. It is recommended you set this up, and by default the image builds will fail if you don't.

This provides users a method of verifying the image.

  1. Install the cosign CLI tool

  2. Run inside your repo folder:

    cosign generate-key-pair
    • Do NOT put in a password when it asks you to, just press enter. The signing key will be used in GitHub Actions and will not work if it is encrypted.

Warning

Be careful to never accidentally commit cosign.key into your git repo.

  1. Add the private key to GitHub

    • This can also be done manually. Go to your repository settings, under Secrets and Variables -> Actions image Add a new secret and name it SIGNING_SECRET, then paste the contents of cosign.key into the secret and save it. Make sure it's the .key file and not the .pub file. Once done, it should look like this: image

    • (CLI instructions) If you have the github-cli installed, run:

    gh secret set SIGNING_SECRET < cosign.key
  2. Commit the cosign.pub file into your git repository

This template includes a Containerfile and a Github workflow for building the container image. As soon as the workflow is enabled in your repository, it will build the container image and push it to the Github Container Registry.

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