Docker is an open-source platform for building, shipping and running distributed applications. Docker runs applications in isolated containers, which contain the application's libraries and settings without bundling a full operating system, allowing for improved density and efficiency. 

Our continuous integration and quality assurance tool,, uses Docker containers to build branches and pull requests. This allows Probo's users to share the containers' links to preview the work in a shared space, allowing for the the container to remain open as long as needed.