docker-helper

name	docker-helper
description	Docker and Docker Compose mastery for containers, images, networks, volumes, and debugging. Use when user asks to "build a container", "run docker", "debug container", "write dockerfile", "docker compose up", "check container logs", "optimize docker image", or any container operations.

Docker Helper

Essential Docker and Docker Compose commands and patterns.

Container Operations

# Run container
docker run -d --name myapp -p 8080:80 nginx
docker run -it --rm ubuntu bash  # Interactive, auto-remove

# With volume and env
docker run -d \
  -v $(pwd):/app \
  -e NODE_ENV=production \
  --name myapp \
  node:18 npm start

# List containers
docker ps          # Running
docker ps -a       # All

# Logs
docker logs myapp
docker logs -f myapp        # Follow
docker logs --tail 100 myapp

# Exec into container
docker exec -it myapp bash
docker exec -it myapp sh    # Alpine

# Stop/remove
docker stop myapp
docker rm myapp
docker rm -f myapp  # Force

Image Operations

# Build
docker build -t myapp:latest .
docker build -t myapp:v1.0 -f Dockerfile.prod .

# List/remove
docker images
docker rmi myapp:latest
docker image prune -a  


docker tag myapp:latest registry.io/myapp:latest
docker push registry.io/myapp:latest