docker-compose-staging.yml

version: '3.8'
# Specifies the version of the Docker Compose file syntax.

services:
    # Defines the services, their configuration, and how they interact.
    app:
        # The 'app' service definition, describing how to build and run your application container.
        build:
            # Instructions for building the Docker image.
            context: . # Specifies the build context location, which is the current directory.
            dockerfile: Dockerfile # Specifies the Dockerfile to use for building the image.
        ports:
            - '5002:5002' # Maps port 5002 on the host to port 5002 in the container, allowing external access.
        env_file:
            - .env.staging # Specifies the environment file that contains the staging environment variables.
        restart: unless-stopped
        # Configures the restart policy to restart the container unless it is explicitly stopped.
        environment:
            - NODE_ENV=staging # Sets the NODE_ENV environment variable to 'staging'.