As we discussed, a Dockerfile is a script that embodies instructions for building a Docker image. It stipulates the base image to use, the commands to run, and the files to copy into the image. After creating a Dockerfile, you can utilize the docker build command to build an image, which is then run as a container.

Meanwhile, Docker Compose is the tool we use for defining and running multi-container Docker applications. You can use it to define the services that make up your application, along with their configurations and dependencies, in a single file called docker-compose.yml.

Dockerfiles and Docker Compose play separate roles, but work in harmony to help streamline your DevOps workflow.

The Docker methodology is to write an appropriate Dockerfile for each image you need to create, then use Docker Compose to group the images together using the build command.

This was a brief overview of the basics of Docker before we delve into more advanced concepts. It’s important to note that there is much more to learn about Docker beyond what we have discussed here.