ডকার (Docker) চিটশিট

docker pull nginx:latest
docker images

docker run -d --name mynginx nginx
docker ps
docker stop mynginx

# Dockerfile
FROM ubuntu:20.04
RUN apt-get update && apt-get install -y python3
COPY . /app
WORKDIR /app
CMD ["python3", "app.py"]

docker build -t mypythonapp .
docker run mypythonapp

docker run -d -p 8080:80 nginx

docker run -d -v mydata:/var/www/html nginx

docker run -e MY_VAR="hello" myapp

ENV MY_VAR="hello"

docker network create mynetwork
docker run --network mynetwork --name app1 myapp

version: '3'
services:
  web:
    image: nginx
    ports:
      - "8080:80"
    volumes:
      - ./html:/usr/share/nginx/html
  db:
    image: postgres
    environment:
      POSTGRES_PASSWORD: mysecretpassword

docker-compose up -d

docker logs mynginx

docker tag myapp myusername/myapp:1.0
docker login
docker push myusername/myapp:1.0

docker save -o myapp.tar myapp
docker load -i myapp.tar

docker system prune

docker run --memory="512m" --cpus="1" myapp

FROM node:16
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 3000
CMD ["npm", "start"]

version: '3'
services:
  app:
    build: .
    ports:
      - "3000:3000"
    volumes:
      - ./src:/app/src
  db:
    image: postgres:13
    environment:
      POSTGRES_USER: user
      POSTGRES_PASSWORD: password
      POSTGRES_DB: mydb
    volumes:
      - pgdata:/var/lib/postgresql/data
 
volumes:
  pgdata:

docker-compose up -d
docker ps