-POSTGRES_USER=${POSTGRES_USER:-user}# Set environment variable POSTGRES_USER with default value 'user'
-POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-password}# Set environment variable POSTGRES_PASSWORD with default value 'password' (not recommended for security reasons)
volumes:
-postgres:/data/postgres# Mount named volume 'postgres' to /data/postgres in container
-postgres:/var/lib/postgresql/data# Mount named volume 'postgres' to /data/postgres in container
ports:
-"5432:5432"# Map host port 5432 to container port 5432
