In this chapter, we have introduced Docker volumes that can be used to persist states produced by containers and make them durable. We can also use volumes to provide containers with data originating from various sources. We have learned how to create, mount, and use volumes. We have learned various techniques of defining volumes such as by name, by mounting a host directory, or by defining volumes in a container image.
In this chapter, we have also discussed how we can configure environment variables that can be used by applications running inside a container. We have shown how to define those variables in the docker container run command, either explicitly, one by one, or as a collection in a configuration file. We have also shown how to parametrize the build process of container images by using build arguments.
In the next chapter, we are going to introduce techniques...
