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Docker Library Bot 2017-08-03 10:31:29 -07:00
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hello-world/README.md
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@ -72,7 +72,7 @@ For more examples and ideas, visit:
$ docker images hello-world
REPOSITORY TAG IMAGE ID SIZE
hello-world latest 1815c82652c0 1.84 kB
hello-world latest 1815c82652c0 1.84kB
```
![logo](https://raw.githubusercontent.com/docker-library/docs/01c12653951b2fe592c1f93a13b4e289ada0e3a1/hello-world/logo.png)

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hello-world/content.md
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@ -26,7 +26,7 @@ For more examples and ideas, visit:
$ docker images hello-world
REPOSITORY TAG IMAGE ID SIZE
hello-world latest 1815c82652c0 1.84 kB
hello-world latest 1815c82652c0 1.84kB
```
%%LOGO%%

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node/README.md
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@ -80,68 +80,7 @@ Node.js internally uses the Google V8 JavaScript engine to execute code; a large
# How to use this image
## Create a `Dockerfile` in your Node.js app project
```dockerfile
FROM node:4-onbuild
# replace this with your application's default port
EXPOSE 8888
```
You can then build and run the Docker image:
```console
$ docker build -t my-nodejs-app .
$ docker run -it --rm --name my-running-app my-nodejs-app
```
### Notes
The image assumes that your application has a file named [`package.json`](https://docs.npmjs.com/files/package.json) listing its dependencies and defining its [start script](https://docs.npmjs.com/misc/scripts#default-values).
It also assumes that you have a file named [`.dockerignore`](https://docs.docker.com/engine/reference/builder/#/dockerignore-file) otherwise it will copy your local npm modules:
node_modules
We have assembled a [Best Practices Guide](https://github.com/nodejs/docker-node/blob/master/docs/BestPractices.md) for those using these images on a daily basis.
All of the images contain pre-installed versions of `node`, [`npm`](https://www.npmjs.com/), and [`yarn`](https://yarnpkg.com). For each supported architecture, the supported variants are different. In the file [architectures](https://github.com/nodejs/docker-node/blob/master/architectures), it lists all supported variants for all of the architectures that we support now.
## Run a single Node.js script
For many simple, single file projects, you may find it inconvenient to write a complete `Dockerfile`. In such cases, you can run a Node.js script by using the Node.js Docker image directly:
```console
$ docker run -it --rm --name my-running-script -v "$PWD":/usr/src/app -w /usr/src/app node:4 node your-daemon-or-script.js
```
## Verbosity
By default the Node.js Docker Image has npm log verbosity set to `info` instead of the default `warn`. This is because of the way Docker is isolated from the host operating system and you are not guaranteed to be able to retrieve the `npm-debug.log` file when npm fails.
When npm fails, it writes it's verbose log to a log file inside the container. If npm fails during an install when building a Docker Image with the `docker build` command, this log file will become inaccessible when Docker exits.
The Docker Working Group have chosen to be overly verbose during a build to provide an easy audit trail when install fails. If you prefer npm to be less verbose you can easily reset the verbosity of npm using the following techniques:
### Dockerfile
If you create your own `Dockerfile` which inherits from the `node` image you can simply use `ENV` to override `NPM_CONFIG_LOGLEVEL`.
FROM node
ENV NPM_CONFIG_LOGLEVEL warn
...
### Docker Run
If you run the node image using `docker run` you can use the `-e` flag to override `NPM_CONFIG_LOGLEVEL`.
$ docker run -e NPM_CONFIG_LOGLEVEL=warn node ...
### NPM run
If you are running npm commands you can use `--loglevel` to control the verbosity of the output.
$ docker run node npm --loglevel=warn ...
See [How To Use This Image](https://github.com/nodejs/docker-node/blob/master/README.md#how-to-use-this-image) on GitHub for up-to-date documentation.
# Image Variants