npm config Use

Environment Variables

Speaking before the config, the first thing to say about this environment variable.

See all Linux system environment variables

env
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node used to the environment variable is NODE_ENV, see if there are

echo $NODE_ENV
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Linux system environment variables added

env
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Sometimes you need to remove an environment variable

unset NODE_ENV
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Environment variables added value

export PATH=$PATH:/home/download:/usr/local/
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config module package using

installation

npm install config

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Use code

Config After a successful installation, you can create several environmental profile in the project.

1. test test environment
2. product production environment
3. development development environment to development environment, for example:

{
  "port": 9001,
  "host": "http://localhost:9001",
  "redis":{
    "host": "localhost",
    "port": 6379,
    "password":"root",
    "db": 2,
    "connectTimeout": 3000,
    "prefix": "koala:"
  }
 }
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Code using a configuration file

const config=require('config');

app.use(require('./middleware/redis')(config.get('redis')));

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Open the app service

• General Startup

export NODE_ENV=development
node app.js
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• A command to start the app server

export NODE_ENV='development' && node app.js
```linux
- pm2指定名称与环境启动app服务

```linux
pm2 start app.js --env development --name koala
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--name name refers pm2 specified process name.

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