Updated todo app readme.md file

Author: JocaPC

samples/features/json/todo-app/nodejs-express4-rest-api/README.md

@@ -17,7 +17,7 @@ This project contains an example implementation of NodeJS REST API with CRUD ope
 
 - **Applies to:** SQL Server 2016 (or higher), Azure SQL Database
 - **Key features:** JSON Functions in SQL Server 2016/Azure SQL Database - FOR JSON and OPENJSON
-- **Programming Language:** JavaScript (NodeJS)
+- **Programming Language:** JavaScript (NodeJS), T-SQL
 - **Authors:** Jovan Popovic
 
 <a name=before-you-begin></a>
@@ -31,7 +31,6 @@ To run this sample, you need the following prerequisites.
 1. SQL Server 2016 (or higher) or an Azure SQL Database
 2. Node.js runtime.
 
-
 **Azure prerequisites:**
 
 1. Permission to create an Azure SQL Database
@@ -40,26 +39,30 @@ To run this sample, you need the following prerequisites.
 
 ## Run this sample
 
-1. Navigate to the folder where you have downloaded sample and run **npm install** in command window.
+1. Navigate to the folder where you have downloaded sample and run **npm update** in the command window.
 
 2. From SQL Server Management Studio or SQL Server Data Tools connect to your SQL Server 2016 or Azure SQL database and
-execute setup.sql script that will create and populate Todo table in the database.
-
-3. Locate db.js file in the project, change database connection info in createConnection() method to reference your database. the following tokens should be replaced:
- 1. SERVERNAME - name of the database server.
- 2. DATABASE - Name of database where Todo table is stored.
- 3. USERNAME - SQL Server login that can access table data and execute stored procedures.
- 4. PASSWORD - Password associated to SQL Server login.
+execute setup.sql script that will create and populate Todo table in the database and create necessary stored procedures.
 
+3. Locate config folder in the project and setup connection info in default.json file. The content of the file should look like:
 ```
-    var config = {
-        server  : "SERVER.database.windows.net",
-        userName: "USER",
-        password: "PASSWORD",
-        // If you're on Azure, you will need this:
-        options: { encrypt: true, database: 'DATABASE' }
-    };
+{
+    "connection":{
+        "server"  : "<<server name or ip>>",
+        "userName": "<<user name>>",
+        "password": "<<password>>",
+        "options": { "encrypt": true, "database": "<<database name>>" }
+    }
+}
 ```
+Content under connection key will be passed to Tedious package, which is used to
+interact with SQL Database. You can find more information
+about the properties in this object on [Tedious site](http://tediousjs.github.io/tedious/getting-started.html).
+
+As an alternative, you can put connection info into Development.json or
+Production.json file. This sample uses [config](https://www.npmjs.com/package/config)
+npm module to read configurations from a file, so you can find more information about
+the configuration there.
 
 4. Run sample app from the command line using **node app.js**
  1. Open http://localhost:3000/todo Url to get list of all Todo items from a table,
@@ -73,8 +76,7 @@ execute setup.sql script that will create and populate Todo table in the databas
 This sample application shows how to create simple REST API service that performs CRUD operations on a simple Todo table.
 NodeJS REST API is used to implement REST Service in the example.
 1. app.js file that contains startup code.
-2. db.js file that contains functions that wrap Tedious library
-3. todo.js file that contains action that will be called on GET, POST, PUT, and DELETE Http requests.
+3. routes/todo.js file that contains action that will be called on GET, POST, PUT, and DELETE Http requests.
 
 Service uses Tedious library for data access and built-in JSON functionalities that are available in SQL Server 2016 and Azure SQL Database.