Devcontainers

This repository contains Ubuntu-based development container definitions and shared shell configuration.

Supported Images

• Ubuntu 24.04
• Ubuntu 26.04

Both variants are built from a single Dockerfile using a build argument.

Repository Layout

• base/ubuntu/Dockerfile: Canonical Ubuntu image definition.
• shared/shell/dot-zshrc: Shared zsh configuration.
• shared/shell/starship.toml: Shared starship prompt configuration.
• shared/shell/key-bindings.zsh: Shared fzf key bindings.
• docs/ARCHITECTURE.md: Structure and ownership model.
• docs/BUILD.md: Build and run commands.

Migration Notes

This tidy-up removed legacy directories and image definitions that are no longer maintained:

• debian/
• fastbook/
• mamba/
• nodejs/
• nodejs-16.x/
• nodejs-current/
• nodejs-lts/
• nodejs-version.x/

The old ubuntu/Dockerfile and ubuntu/Dockerfile-2604 paths were replaced by base/ubuntu/Dockerfile.

Quick Start

See docs/BUILD.md for full commands.

Automated Publishing

This repository includes a scheduled GitHub Actions workflow at .github/workflows/weekly-docker-publish.yml that builds and pushes multi-architecture images to Docker Hub.

• Schedule: weekly on Sunday at 02:00 UTC.
• Platforms: linux/amd64 and linux/arm64.
• Published tags:
  • alastair87/ubuntu:24.04
  • alastair87/ubuntu:26.04
  • alastair87/ubuntu:latest (from the 26.04 build)
• Manual trigger: workflow_dispatch.

Required repository secrets:

• DOCKERHUB_USERNAME
• DOCKERHUB_TOKEN