Source: 📖 Django for Professionals ch3 p40

What are Docker volumes?

Docker volumes allow you to sync data bidirectionally between a container and your local computer — any changes to either local files or container files will show up in both. They are set up in the docker-compose.yml file, by specifying a volumes key and mapping a local directory to a docker directory.

# docker-compose.yml

version:'3.8'

services:
	web:
		build: .
		command: python /code/manage.py runserver 0.0.0.0:8000
		volumes:


.:/code


		ports:
			...
		...

In the above code, we sync the local directory where the compose file exists to the /code directory in the Docker container using .:/code. The leading - is syntax to represent a list item, so we could create another volume with another line below this one starting with a -. The . represents the local directory where the compose file is stored.