RUN npm install RUN npm run build CMD npm run serve Each line inside a Dockerfile is called an instruction. git clone -b docker/basic Next, open up the Dockerfile to see what instructions are already there. Create the Node.js appįirst, create a new directory where all the files would live. Specifically, we want to use the docker/basic branch.
It is as simple as running docker build optionsAn image is the blueprint for a container, a container is a running instance of an image. The next step is to invoke the docker daemon to actually execute the directives in the Dockerfile. Usually, a container consists of an application running in a stripped-to-basics version of a Linux operating system. In the first part of this guide we will create a simple web application in Node.js, then we will build a Docker image for that application, and lastly we will instantiate a container from that image.ĭocker allows you to package an application with its environment and all of its dependencies into a "box", called a container. Moving on, the Dockerfile is a text file named Dockerfile (no file extension) placed within your application scope, generally at the root.
The guide also assumes you have a working Docker installation and a basic understanding of how a Node.js application is structured. The easiest thing to do is to use the Docker Hub node image. The guide is intended for development, and not for a production deployment.
Nodejs dockerfile how to#
The goal of this example is to show you how to get a Node.js application into a Docker container.
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