# Sequence diagram for Docker image build and push workflow (non-PR run)

[Dargon789]

Reviewer's Guide

Introduces a new GitHub Actions workflow that automates Docker image building, tagging, caching, pushing, and cosign signing via Buildx, metadata-action, and sigstore tools, with scheduled, push, and pull request triggers and conditional steps for PR vs non-PR runs.

Sequence diagram for Docker image build and push workflow (non-PR run)

sequenceDiagram
  participant GitHub as "GitHub Actions Runner"
  participant Repo as "Repository"
  participant Buildx as "Docker Buildx"
  participant Registry as "Docker Registry (ghcr.io)"
  participant Cosign as "Cosign"
  participant Rekor as "Rekor Log"
  GitHub->>Repo: Checkout repository
  GitHub->>Buildx: Set up Buildx
  GitHub->>Registry: Login to registry
  GitHub->>Buildx: Build Docker image
  Buildx->>Registry: Push Docker image
  GitHub->>Cosign: Sign Docker image
  Cosign->>Rekor: Write to transparency log (if public)

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Sequence diagram for Docker image build workflow (PR run)

sequenceDiagram
  participant GitHub as "GitHub Actions Runner"
  participant Repo as "Repository"
  participant Buildx as "Docker Buildx"
  GitHub->>Repo: Checkout repository
  GitHub->>Buildx: Set up Buildx
  GitHub->>Buildx: Build Docker image
  Note over Buildx: No push, login, or signing steps on PR

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File-Level Changes

Change	Details	Files
Add Docker CI workflow	Define cron schedule, push, tag, and pull_request triggers Set REGISTRY and IMAGE_NAME environment variables Configure build job with Dockerfile build and dynamic tagging Add steps: checkout, conditional cosign install, Buildx setup, conditional registry login Extract image metadata and perform build-push with cache support Sign pushed images using cosign and GitHub OIDC token	.github/workflows/docker.yml

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Originally posted by @sourcery-ai[bot] in #41 (comment)