Overview

Important

From July 2023 Compose V1 stopped receiving updates. It's also no longer available in new releases of Docker Desktop.

Compose V2 is included with all currently supported versions of Docker Desktop. For more information, see Migrate to Compose V2.

Docker's documentation refers to and describes Compose V2 functionality.

Environment variables can help you define various configuration values. They also keep your app flexible and organized.

This section covers:

• The various ways you can set environment variables in Compose.
• How environment variable precedence works.
• The correct syntax for an environment file.
• Changing pre-defined environment variables.