Docker

Images, containers, volumes, and Compose in one page.

docker build -t app .Build from Dockerfile

docker imagesList images

docker pull <image>Download image

docker rmi <image>Remove image

docker tag src dstTag an image

docker run -d -p 80:80 appRun detached + port map

docker psRunning containers

docker ps -aAll containers

docker stop <id>Stop a container

docker rm <id>Remove a container

docker exec -it <id> shShell into container

docker logs -f <id>Follow logs

FROM node:22-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
EXPOSE 3000
CMD ["node", "server.js"]

docker compose up -dStart services

docker compose downStop + remove

docker compose logs -fTail all logs

docker compose psList services

docker compose buildBuild services

docker system pruneRemove unused data

docker system prune -aAlso unused images

docker volume pruneRemove unused volumes

docker statsLive resource usage

prune is irreversible — it deletes stopped containers and dangling images.

More DevOps cheatsheets

Docker Compose

Multi-container orchestration — services, ports, volumes, and networks.