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30 lines
1.7 KiB
Markdown
30 lines
1.7 KiB
Markdown
# What is Node.js?
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Node.js is a software platform for scalable server-side and networking applications. Node.js applications are written in JavaScript, and can be run within the Node.js runtime on Mac OS X, Windows and Linux with no changes.
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Node.js applications are designed to maximize throughput and efficiency, using non-blocking I/O and asynchronous events. Node.js applications run single-threaded, although Node.js uses multiple threads for file and network events. Node.js is commonly used for real time applications due to its asynchronous nature.
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Node.js internally uses the Google V8 JavaScript engine to execute code, and a large percentage of the basic modules are written in JavaScript. Node.js contains a built-in asynchronous I/O library for file, socket and HTTP communication. The HTTP and socket support allows Node.js to act as a web server without additional web server software such as Apache.
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> [wikipedia.org/wiki/Node.js](https://en.wikipedia.org/wiki/Node.js)
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# How to use this image
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## Create a `Dockerfile` in your nodejs app project.
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FROM node:0.10.31-onbuild
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# replace this with your application's default port
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EXPOSE 8888
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# replace this with your main "server" script file
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CMD [ "node", "server.js" ]
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Then build and run the docker image.
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docker build -t my-nodejs-app
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docker run -it --rm --name my-running-app my-nodejs-app
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## Run a single nodejs script
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For many single file projects, it may not be convenient to write a `Dockerfile` for your project. In such cases, you can run a nodejs script by using the nodejs docker image directly.
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docker run -it --rm --name my-running-script -v $(pwd):/usr/src/myapp -w /usr/src/myapp node:0.10.31 node your-daemon-or-script.rb
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