docs: update nodejs versions to 22 in README.md

[mertssmnoglu]

Description

Updated node:8 and node:16 image tags to node:22 in README.

Motivation and Context

As a developer, I would like to see latest LTS version in the documentation.

Types of changes

• Documentation
• Version change (Update, remove or add more Node.js versions)
• Variant change (Update, remove or add more variants, or versions of variants)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Other (none of the above)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING.md document.
• All new and existing tests passed.

[mertssmnoglu]

I'm also thinking about updating docker compose example too. Is it OK to do it in this PR?

services:
  node:
    image: "node:22"
    environment:
      - NODE_ENV=production
    volumes:
      - ./:/home/node/app
    ports: # use if it is necessary to expose the container to the host machine
      - "8081:8081"
    command: ["npm", "start"]