Have you used Docker in all your projects?

No, Docker is not mandatory in all projects. Docker is a tool for containerizing applications, which simplifies deployment and dependency management, but its use depends on the project requirements and infrastructure.

In some cases, projects can do without Docker, for example, if the application is simple, deployed on a single server, or if another environment management system is used.

However, Docker is often used for:

• Ensuring a consistent development and production environment
• Simplifying scaling and deployment
• Isolating services

The decision to use Docker is made based on the specifics of the project and the team.