The setup is straightforward.<p>I use VirtualBox to run CoreOS, but VM can run anything as long as it comes with a recent Docker and does not require a lot of maintenance. Then I run lsyncd to synchronize files from the host transparently into that VM and edit whatever files I need in the Emacs on the host. When I need to run a docker command, I do it either from Emacs by prefixing the command with ssh local-vm-name or from a ssh session in a terminal.<p>To test the things I use, for example, another VM where &#x2F;etc&#x2F;hosts points for my production domains to the VM with Docker. Another useful thing is to expose during development, say, PHP&#x2F;JS code that I edit directly into container for quick testing feedback. For that I can run the container with an extra host volume mount that override the software tree in the image with one that comes from Docker VM and where lsyncd copies all my changes that I made in Editor.