brew install --cask docker
open -a Docker

sudo apt update
sudo apt install -y docker.io
sudo usermod -aG docker $USER
newgrp docker

docker version
docker info
docker pull nginx:latest
docker images
docker ps
docker ps -a
docker run --rm -p 8080:80 nginx:latest
docker exec -it <container> /bin/sh
docker logs -f <container>
docker stop <container>
docker rm <container>

FROM python:3.11-slim
WORKDIR /app
COPY requirements.txt .
RUN pip install -r requirements.txt
COPY . .
CMD ["python", "app.py"]

docker build -t myapp:latest .
docker run --rm -p 8000:8000 myapp:latest

services:
  web:
    build: .
    ports:
      - "8000:8000"
    environment:
      - APP_ENV=dev
  db:
    image: postgres:16
    environment:
      - POSTGRES_PASSWORD=example
    ports:
      - "5432:5432"

docker compose up -d
docker compose logs -f
docker compose down

docker volume ls
docker volume create app-data
docker run -v app-data:/var/lib/app myapp:latest

docker network ls
docker network create app-net
docker run --network app-net --name web myapp:latest