In certain scenarios, such as when developing new containerized applications or when a containerized application needs to consume data from a certain folder produced, say, by a legacy application, it is very useful to use volumes that mount a specific host folder. Let's look at the following example:
$ docker container run --rm -it \ -v $(pwd)/src:/app/src \ alpine:latest /bin/sh
The preceding expression interactively starts an alpine container with a shell and mounts the subfolder src of the current directory into the container at /app/src. We need to use $(pwd) (or 'pwd' for that matter) which is the current directory, as when working with volumes we always need to use absolute paths.
Developers use these techniques all ...