![]() ![]() 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.Images: in Docker, images are "snapshots" or templates of a file system, and contain everything that is needed to launch an application.In case you're just getting started with Docker, here are some terms that are worth reviewing, to make sure that we're on the same track. If you don't have any previous Docker experience, that's fine, this tutorial is pretty basic and explains the main concepts around what we're doing.Some steps also require that you have Docker Hub (free) account to upload the Docker image for the application.If you are using another distribution, you might have to look for specific instructions when it's time to install Docker on your server You should also have a cloud server with a Linux distribution, preferably Ubuntu 18.04.If you don't have it, you can find the instructions for installing it in the official documentation This tutorial assumes that you have Docker installed on your local system.This tutorial shows how to deploy a Node.js application to a cloud server through Docker, Docker Hub and Docker Compose. Node.js is a JavaScript runtime that in the past years has become popular for building server-side apps.
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