WIP - Testing gha/build images

[tobybellwood]

This pull request introduces a new GitHub Actions workflow for building and publishing multi-architecture Docker images, and updates several Dockerfiles to improve multi-arch build support and reliability. The changes focus on standardizing build environments, ensuring consistent architecture targeting, and improving build robustness.

CI/CD and Build Improvements:

• Added a new workflow .github/workflows/build-images.yml to automate building and publishing Docker images for different branches and tags, supporting multi-architecture builds and mirroring images to DockerHub and GHCR.
• Updated Node.js workspace Dockerfile to increase the yarn network timeout, improving reliability in environments with slow network connections.

Dockerfile Multi-Architecture and Build Consistency:

• Updated all Go-based service and task image Dockerfiles (services/actions-handler, services/api-sidecar-handler, services/backup-handler, services/logs2notifications, taskimages/activestandby, taskimages/projectclone) to:

  • Explicitly specify --platform=linux/amd64 for the builder stage to ensure native builds and avoid QEMU-related issues.
  • Use the TARGETARCH build argument for the Go GOARCH environment variable, enabling correct cross-compilation for multi-arch images. [1] [2] [3] [4] [5] [6]

• Updated the taskimages/projectclone Dockerfile to also apply these changes to the lagoon-sync build stage.

• Updated the services/keycloak Dockerfile to force the Maven build stage to use linux/amd64, avoiding TLS handshake failures under QEMU emulation and ensuring the resulting JAR is architecture-neutral.