Public Access
Exit 127, `docker: command not found`, from the build step of the image job. The daemon was never the problem and never missing: Testcontainers speaks to /var/run/docker.sock from a .NET library, so every integration suite in the build job had been starting PostgreSQL, Keycloak and an sshd on this runner while `docker` was not a command on it at all. Having a socket and having a client are two different things to have, and this runner had one. It failed late for the same reason it was easy to miss. Node, git, the SDK and the tags all came up fine, so the job looked healthy right until the line that actually needed the binary. The client only. There is a daemon answering on that socket already — installing an engine would start a second one beside the one in use, which is a worse outcome than the error. Verified by running this step's own script in an Alpine container with the socket mounted: it installs docker-cli, the client then reports server 29.6.2 across the socket, and the API image builds to completion from inside that container with the repository as its context. Which is as close to the runner as this can be checked without being it. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>