doc : being more explicit in the synopsis

doc/api/synopsis.md

@@ -9,9 +9,62 @@ Please see the [Command Line Options][] document for information about
 different options and ways to run scripts with Node.js.
 
 ## Example
-
 An example of a [web server][] written with Node.js which responds with
-`'Hello World'`:
+`'Hello World!'`:
+
+Commands displayed in this document are shown starting with `$` or `>` 
+to replicate how they would appear in a user's terminal. 
+Do not include the `$` and `>` character.
+They are there to indicate the start of each command. 
+
+There are many tutorials and examples that follow this 
+convention: `$` or `>` for commands run as a regular user, and `#` 
+for commands that should be executed as an administrator. 
+
+Lines that don’t start with `$` or `>` character are typically showing 
+the output of the previous command.
+
+Firstly, make sure to have downloaded Node.js from [Node.js Official website](http://nodejs.org/#download).
+
+To install Node using a package manager, see [this guide](https://nodejs.org/en/download/package-manager/).
+
+
+Now, create an empty project folder called `projects`, navigate into it:
+Project folder can be named base on user's current project title but
+this example will use `projects` as the project folder. 
+
+UNIX :
+
+```console
+$ mkdir ~/projects
+$ cd ~/projects
+```
+Windows CMD:
+```console
+> mkdir %USERPROFILE%\projects
+> cd %USERPROFILE%\projects
+```
+
+Windows PowerShell:
+
+```console
+> mkdir $env:USERPROFILE\projects
+> cd $env:USERPROFILE\projects
+```
+
+Next, create a new source file in the `projects` folder
+and call it `hello-world.js`.
+
+If filename has more than one word, use a hyphen(`-`) or 
+an underscore(`_`) to separate them for simplicity and avoid using 
+the space character in file names. 
+
+For example, use `hello-world.js` rather than `hello world.js`.
+Node.js files always end with the `.js` extension. 
+
+Open `hello-world.js` in any preferred text editor and paste in the following 
+content.
+
 
 ```js
 const http = require('http');
@@ -22,21 +75,27 @@ const port = 3000;
 const server = http.createServer((req, res) => {
   res.statusCode = 200;
   res.setHeader('Content-Type', 'text/plain');
-  res.end('Hello World\n');
+  res.end('Hello World!\n');
 });
 
 server.listen(port, hostname, () => {
   console.log(`Server running at http://${hostname}:${port}/`);
 });
 ```
+Save the file, go back to the terminal window enter the following command:
 
-To run the server, put the code into a file called `example.js` and execute
-it with Node.js:
-
-```txt
-$ node example.js
-Server running at http://127.0.0.1:3000/
+```console
+$ node hello-world.js
 ```
+an output like this should appear in the terminal to indicate Node.js 
+server is running:
+ ```console
+ Server running at http://127.0.0.1:3000/
+ ````
+Now, open any preferred web browser and visit `http://127.0.0.1:3000`.
+
+If the browser displays the string `Hello, world!`, that indicates 
+the server is working.  
 
 Many of the examples in the documentation can be run similarly.