Codespaces

This month at Stir Trek 2025, I presented on Dev Containers and GitHub Codespaces, demonstrating how these tools streamline both local and cloud-based development workflows. The session covered the essentials of creating portable development environments, customizing containers with features and extensions, and launching Codespaces directly from your repository. A lively Q&A followed, with attendees asking about strategies for running and working with multiple containers. Below, I’ve distilled those discussions and provided a deeper dive into shared container configurations across multiple projects-including folder structures, Docker Compose setups, VS Code workflows, and advanced tips you can apply in your own work.

Last week, I spoke at the Copenhagen Developers Festival about using GitHub Codespaces for cloud-based development. This is an amazing conference with an incredible lineup. I’ve done this talk plenty of times, sharing how flexible and convenient cloud development environments can be. But this time, things didn’t go as planned.