UPDATE(*.js): Add js doc

Add documentation of all functions on repository.

index.js

@@ -2,14 +2,16 @@
 
 let switchModule = require('./lib/modules/switch/switch');
 
+/**
+ * Create app function to select the framework with switch module, inject dependencies and variables on it
+ * @param framework
+ * @param dependencies
+ * @param variables
+ */
 let createApp = (framework = 'express', dependencies = [], variables  = []) => {
     let selectedFramework = switchModule.switch(framework);
     selectedFramework.init(dependencies, variables);
     return selectedFramework;
 };
 
-/**
- * Expose `createApp()`.
- */
-
 exports = module.exports = createApp;

lib/modules/express/dependencies.js

@@ -1,5 +1,11 @@
 'use strict';
 
+/**
+ * Load function to set an array of dependencies for express framework
+ * @param app
+ * @param dependencies
+ * @returns expressApp
+ */
 exports.load = (app, dependencies = []) => {
     dependencies.forEach((dependency) => {
         app.use(dependency.name, dependency.instance);

lib/modules/express/express.js

@@ -4,8 +4,13 @@ let dependencies = require('./dependencies');
 let variables = require('./variables');
 let app = require('express')();
 
+/**
+ * Function to set dependencies and variables to express framework.
+ * @param dependenciesToLoad
+ * @param variablesToLoad
+ * @returns expressApp
+ */
 exports.init = (dependenciesToLoad = [], variablesToLoad = []) => {
     app = dependencies.load(app, dependenciesToLoad);
-    app = variables.load(app, variablesToLoad);
-    return app;
+    return variables.load(app, variablesToLoad);
 };

lib/modules/express/variables.js

@@ -1,5 +1,11 @@
 'use strict';
 
+/**
+ * Load function to set an array of variables for express framework
+ * @param app
+ * @param variables
+ * @returns expressApp
+ */
 exports.load = (app, variables = []) => {
     variables.forEach((variable) => {
        app.set(variable.name, variable.object);

lib/modules/switch/switch.js

@@ -3,6 +3,11 @@
 let expressModule = require('../express/express');
 let restifyModule = require('../restify/restify');
 
+/**
+ * Switch to select the framework to inject the dependencies
+ * @param framework
+ * @returns createdAppFramework
+ */
 exports.switch = (framework = 'express') => {
     switch(framework) {
         case 'express':