Docker solved the 'it works on my machine' problem. It allows developers to package an application with all of its dependencies into a standardized unit called a container. This container runs exactly the same way on a developer's laptop as it does on a massive server in the cloud.

For web development, it creates consistent environments. You can spin up a WordPress installation, a database, and a Node.js server with a single command.

Key Highlights:

• Consistency: Environments match perfectly dev-to-prod.
• Isolation: Apps run separately without conflicting.
• Portability: Move containers between any cloud provider.

Verdict: Essential knowledge for backend and full-stack developers.

Frequently Asked Questions