🐳 Docker errors

Docker daemon, image, container, port and disk errors.

Code	Error	What it means
daemon	Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?	The docker CLI can’t talk to the Docker engine — it isn’t running, or your user can’t access the socket.
port is already allocated	Docker: Bind for 0.0.0.0:80 failed: port is already allocated	Another container or host process already publishes that host port.
ENOSPC	no space left on device (Docker / Linux)	The disk (or inode table) is full — Docker images, build cache, logs and volumes are common culprits.