1. install package 'nconf'
2. Type in the following code:
```
var nconf = require('nconf');
nconf.argv()
.env()
.file( { file: 'path/to/config.json' });
nconf.set();
nconf.save();
```
These are all missing from the auto complete list.
2. Type in the following code:
```
var nconf = require('nconf');
nconf.argv()
.env()
.file( { file: 'path/to/config.json' });
nconf.set();
nconf.save();
```
These are all missing from the auto complete list.