A Dockerfile is a text file that contains instructions and details required to build a Docker image, such as the environment and configuration parameters.
Specifically, the Dockerfile describes the container’s configuration, including its base image, run commands, working directory, what software to install, and ports to expose. You can automate Docker image builds using Dockerfiles, which improves deployment consistency across different environments and infrastructures.
You can deploy apps using Docker images on DigitalOcean’s App Platform and Kubernetes.