feat(config): Local env configurations

Adds the ability to configure multiple env configurations, for the
various NODE_ENV's. These configs can be used to override the current
configuration, using the appropriate local-NODE_ENV.js file that the
user has defined.

Updated the local.example.js comments to be clear on the usage.

Added config/env/local-*.js to gitignore.

Updated the copy:localConfig Grunt task to copy local.example as
local-development.js, since we're no longer going to use local.js.

.gitignore

@@ -22,6 +22,7 @@ public/dist/
 uploads
 modules/users/client/img/profile/uploads
 config/env/local.js
+config/env/local-*.js
 *.pem
 
 # Ignoring MEAN.JS's gh-pages branch for documenation

config/config.js

@@ -187,12 +187,8 @@ var initGlobalConfig = function () {
   var pkg = require(path.resolve('./package.json'));
   config.meanjs = pkg;
 
-  // We only extend the config object with the local.js custom/local environment if we are on
-  // production or development environment. If test environment is used we don't merge it with local.js
-  // to avoid running test suites on a prod/dev environment (which delete records and make modifications)
-  if (process.env.NODE_ENV !== 'test') {
-    config = _.merge(config, (fs.existsSync(path.join(process.cwd(), 'config/env/local.js')) && require(path.join(process.cwd(), 'config/env/local.js'))) || {});
-  }
+  // Extend the config object with the local-NODE_ENV.js custom/local environment. This will override any settings present in the local configuration.
+  config = _.merge(config, (fs.existsSync(path.join(process.cwd(), 'config/env/local-' + process.env.NODE_ENV + '.js')) && require(path.join(process.cwd(), 'config/env/local-' + process.env.NODE_ENV + '.js'))) || {});
 
   // Initialize global globbed files
   initGlobalConfigFiles(config, assets);

config/env/local.example.js

@@ -1,10 +1,21 @@
 'use strict';
 
-// Rename this file to local.js for having a local configuration variables that
+// Rename this file to local-NODE_ENV.js (i.e. local-development.js, or local-test.js) for having a local configuration variables that
 // will not get commited and pushed to remote repositories.
 // Use it for your API keys, passwords, etc.
 
-/* For example:
+// WARNING: When using this example for multiple NODE_ENV's concurrently, make sure you update the 'db' settings appropriately.
+// You do not want to accidentally overwrite/lose any data. For instance, if you create a file for 'test' and don't change the 
+// database name in the setting below, running the tests will drop all the data from the specified database.
+//
+// You may end up with a list of files, that will be used with their corresponding NODE_ENV:
+//
+// local-development.js
+// local-test.js
+// local-production.js
+//
+
+/* For example (Development):
 
 module.exports = {
   db: {

gruntfile.js

@@ -218,9 +218,9 @@ module.exports = function (grunt) {
     copy: {
       localConfig: {
         src: 'config/env/local.example.js',
-        dest: 'config/env/local.js',
+        dest: 'config/env/local-development.js',
         filter: function () {
-          return !fs.existsSync('config/env/local.js');
+          return !fs.existsSync('config/env/local-development.js');
         }
       }
     }