Update README.md with examples

Author: hiro5id

README.md

@@ -1,7 +1,7 @@
 # console-log-json
 
 ## Pupose and Description
-A drop-in replacement for `console.log()`, `console.info()`, 
+A no fuss simple drop-in replacement for `console.log()`, `console.info()`, 
 `console.error()` to handle anything you throw at it and have the 
 output be formatted to a consistent format in a single JSON line of text, including stack traces, 
 so that it can be easily parsed by tool such as LogDNA.
@@ -13,4 +13,25 @@ so that it can be easily parsed by tool such as LogDNA.
 - Log extra context if passed in.
 - Won't crash out and cause the application to stop, if there is a problem with logger, instead try to fall back to original console.log, output what is possible and continue. 
 - Logging is done in a non awaiting promise so that we yield to other processing while logging
-- Logs via error level when message contains the word "error" to properly flag errors even if a mistake is made using the wrong console.info instead of console.error.
+- Logs via error level when message contains the word "error" to properly flag errors even if a mistake is made using the wrong console.info instead of console.error.
+
+## Usage
+
+1. Install
+    ```
+    npm install console-log-json
+    ```
+2. At the entry point of the application include the package and run *LoggerAdaptToConsole()*
+    ```
+    import { LoggerAdaptToConsole } from "console-log-json";
+    LoggerAdaptToConsole();
+    ```
+    This will adapt *console.log()*, *console.error()*, etc... to take in any string, or object, in any order or any number of them, and it will log a consistently formatted single line JSON to console.
+    For example:
+    ```
+    console.warn('this is a message', {'some-extra-data': 'hello'});
+    ```
+    will produce:
+    ```
+    {"level":"warn","message":"this is a message","some-extra-data":"hello","@timestamp":"2019-11-29T21:44:40.463Z"}
+    ```