Advanced Express Web Application Development

Configuring Express with Nconf

Nconf is a configuration tool that we will use to create hierarchical/environment configuration files for our application. Let's install Nconf:

npm install nconf --save

The first thing we will do is to move the following hardcoded port number from our Express application into our configuration:

app.set('port', 3000);

Let's create the module ./lib/configuration/index.js, which will allow us to to read configuration data from JSON files. We import the nconf module and define a constructor function, Config. We then load a configuration file based on the current environment and load the default configuration that holds non-environmental configuration data. We also define a function get(key), which accepts a key and returns ...