conf-env use demo

sample

$ npm install conf-env-demo
$ cd ./node_modules/conf-env-demo

Then

Test development

$ export NODE_ENV=development && node app.js

Test production

$ export NODE_ENV=production && node app.js

Test staging

$ export NODE_ENV=staging && node app.js

Output

package name is : conf-env-demo
current config env is :  development
current-> development.js
local -> read from local config
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