Docker Containerization: The Complete Guide for Developers

# Install Chocolatey package manager (if not already installed)
Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))

# Install Docker Desktop
choco install docker-desktop

# Alternatively, download directly from Docker Hub
# https://hub.docker.com/editions/community/docker-ce-desktop-windows/

# Install Docker Desktop using Homebrew
brew install --cask docker

# After installation, open Docker from Applications
open /Applications/Docker.app

# Alternatively, download directly from Docker Hub
# https://hub.docker.com/editions/community/docker-ce-desktop-mac/

# Update the apt package index
sudo apt-get update

# Install packages to allow apt to use a repository over HTTPS
sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \
    lsb-release

# Add Docker's official GPG key
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

# Set up the stable repository
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# Install Docker Engine
sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io

# Verify installation
sudo docker run hello-world

# List downloaded images
docker images

# Pull an image from a registry
docker pull nginx:latest

# Remove an image
docker rmi nginx:latest

# Inspect an image
docker image inspect nginx:latest

# Build an image from a Dockerfile
docker build -t my-app:1.0 .

# Run a container from an image
docker run -d -p 80:80 --name webserver nginx

# List running containers
docker ps

# List all containers (including stopped ones)
docker ps -a

# Stop a container
docker stop webserver

# Start a stopped container
docker start webserver

# Remove a container
docker rm webserver

# View container logs
docker logs webserver

# Execute a command in a running container
docker exec -it webserver bash

# Use an official Python runtime as a parent image
FROM python:3.9-slim

# Set the working directory in the container
WORKDIR /app

# Copy the current directory contents into the container
COPY . /app

# Install any needed packages specified in requirements.txt
RUN pip install --trusted-host pypi.python.org -r requirements.txt

# Make port 80 available to the world outside this container
EXPOSE 80

# Define environment variable
ENV NAME World

# Run app.py when the container launches
CMD ["python", "app.py"]

version: '3.8'

services:
  web:
    build: .
    ports:
      - "5000:5000"
    volumes:
      - .:/code
    environment:
      FLASK_ENV: development
    depends_on:
      - redis

  redis:
    image: "redis:alpine"
    volumes:
      - redis-data:/data

volumes:
  redis-data:

# Start all services in the background
docker-compose up -d

# View running services
docker-compose ps

# View logs from all services
docker-compose logs

# View logs from a specific service
docker-compose logs web

# Stop all services
docker-compose down

# Stop and remove volumes
docker-compose down -v

# Build or rebuild services
docker-compose build

# Execute a command in a running service
docker-compose exec web bash