Can you explain the main differences between Docker and Docker Compose and their purposes in development and deployment?

Docker is a platform for creating, delivering, and running containers. With Docker, you create images and run containers that isolate applications and their environments.

Docker Compose is a tool for defining and running multi-container Docker applications. It allows you to describe the configuration of multiple containers in a single YAML file (docker-compose.yml) and manage them as a single application.

Main differences and purposes:

• Docker manages individual containers, images, networks, and volumes.
• Docker Compose simplifies the launching and orchestration of multiple related containers (e.g., web server + database) with a single command.

Example of using Docker Compose:

version: '3'
services:
  web:
    image: my-web-app
    ports:
      - "80:80"
  db:
    image: postgres
    environment:
      POSTGRES_PASSWORD: example

Running all services with one command:

docker-compose up

Thus, Docker is a basic tool for containerization, and Docker Compose is a convenient way to manage complex applications consisting of multiple containers.