1/5/2023 0 Comments Nodejs dockerfile![]() The reason is simple: dependencies change way less often than code, so we can leverage build cache. #NODEJS DOCKERFILE INSTALL#Install NPM dependencies before adding code To start the application just type docker-compose up and it will build an image on first start and then run the container(s) defined in YAML. Here's an example docker-compose.yml file that builds and runs our Docker image in development mode: version: '3' services: myapp: build: args: - NODE_ENV=development context. # Defaults to production, docker-compose overrides this to development on build and run.įor local development we can override it's value. Packages in devDependencies and peerDependencies are ignored. In short NODE_ENV=production switch middlewares and dependencies to efficient code path and NPM installs only packages in dependencies. This is the most important one, as it affects NPM described below. Node process no longer runs with root privileges.īy such simple change you've increased security of the image a lot. The `node` user is built in the Node image. ![]() The best option is to use it before any NPM dependencies or code are added. Laverage non-root userĭefault NodeJS images have node user, but it has to be enabled. Here I'll be using NodeJS and NPM in examples, but most of those patterns can be applied to other runtimes as well. frontend server, backend server, database. ![]() ![]() Also we want to make the docker build process fast by removing unnecessary steps and using practices outlined below to leverage internal build cache.īesides pure Docker I'll present docker-compose tool, which is a tool to start many Docker containers that are required to run the application, i.e. The goal is to produce minimal image to keep the size low and reduce attack surface. ![]()
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