Finally, the entrypoint is set to bootstrap.sh вЂ“ meaning that when a container is started based on the image, this file will be executed. NPM package n is installed ( ) for doing version management of Node.js and the currently stable release of Node.js is installed вЂ“ in addition to the version of Node.js shipped in the Node Docker image. The file bootstrap.sh вЂ“ which is in that docker-work directory вЂ“ is made executable. The contents of directory docker-work (off the current working directory) is copied into directory /code inside the Docker image. The scripts defines a number of environment variables with (default) values these values can be overwritten when a container is run. It starts from the Docker Image node вЂ“ the official base image (see for details). # JUST_RUN specifies whether node should be installed and git should be cloned

Run Node.js application from GitHub repository by starting a Docker container from the image created in the previous steps Create Node.js application and push to GitHub)Д¦. Push image to public Docker Hub Registry ( ) bootstrap.sh file to run when the container is startedД¤. My own sources are part of the GitHub Repository at вЂ“ with resources for a workshop on Microservices, Choreography, Docker, Kubernetes, Node.jS, Kafka and more.Дў. Note: this work is based on the Docker Image created by jakubknejzlik вЂ“ see and.

The same image is started, passing a different GIT_URL and different instructions regarding the directory and the script to run вЂ“ and also a different environment variable called PORT. To run an entirely different Node.js application, I can use this command:Дocker run -e вЂњGIT_URL= вЂќ -p 8010:8888 -eвЂќPORT=8888вЂі -e вЂњAPP_HOME=.вЂќ -e вЂњAPP_STARTUP=app.jsвЂќ lucasjellema/node-app-runner It maps port 8080 inside the container to port 8005 on the host in the standard Docker way. It passes an additional environment variable APP_PORT to the runtime вЂ“ to be used in the node application (_PORT). This command will run the script requestCounter.js in the part1 directory in the repo found in GitHub at the URL specified. An example of the command line to use:Дocker run -e вЂњGIT_URL=вЂќ -e вЂњAPP_PORT=8080вЂќ -p 8005:8080 -e вЂњAPP_HOME=part1вЂќ -e вЂњAPP_STARTUP=requestCounter.jsвЂќ lucasjellema/node-app-runner When a container is run from this image, the url for the GitHub Repo is passed in as environment variable вЂ“ as well as (optionally) the directory in the repo to run the application from, the name of the file to run and the specific version of the Node runtime to use. The usage of this image is shown in this picture:ДЄny Node.JS application in any public GitHub repo can be run using this Docker Container Image. This article shows how I create a generic Docker Container Image to run any Node.JS application based on sources for that application on GitHub.

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