![]() The Dockerfile is the place where you put the instructions that allow Docker to build an image. In this tutorial, we're going to use Docker Hub, but there are also alternatives provided by GCP, AWS, Azure, GitHub, and others.Ĭreate a file called Dockerfile with the following content in the root of your Node.js project directory: Registries are the place where you upload ( push) images to make them available to the world, or to those that have the credentials to access it.This means that you don't need to re-build or re-download all the layers of an image when only one of them changes Each layer is built on top of another one, allowing to provide a feature called layer caching. Layers are the elements that compose a Docker image.They are created by taking a template (an image) and turning it into something that can be started and has a state Containers: these are the actual running instances of the application. ![]()
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