Update README with Rails & Not Rails Example

Author: metaskills

README.md

@@ -3,10 +3,15 @@
 
 # Mysql2 Lambda Gem
 
-<a href="https://github.com/customink/lamby"><img src="https://user-images.githubusercontent.com/2381/59363668-89edeb80-8d03-11e9-9985-2ce14361b7e3.png" alt="Lamby: Simple Rails & AWS Lambda Integration using Rack." align="right" width="300" /></a>Very simple [Mysql2](https://github.com/brianmario/mysql2) gem precompiled for Amazon Linux 1 & 2 (Ruby 2.5 & 2.7) with statically linked `libmysqlclient` ready for any AWS Lambda usage, including Rails.
+<a href="https://github.com/customink/lamby"><img src="https://user-images.githubusercontent.com/2381/59363668-89edeb80-8d03-11e9-9985-2ce14361b7e3.png" alt="Lamby: Simple Rails & AWS Lambda Integration using Rack." align="right" width="300" /></a>Very simple [Mysql2](https://github.com/brianmario/mysql2) gem precompiled for Amazon Linux 1 & 2 (Ruby 2.5 & 2.7) with statically linked `libmysqlclient` ready for any AWS Lambda usage, including Rails. Add it to your Gemfile:
+
 
 ```ruby
+# When using Rails.
 gem 'mysql2-lambda'
+
+# When NOT using Rails.
+gem 'mysql2-lambda', require: 'mysql2'
 ```
 
 Part of a suite of open source projects from **[Lamby: Simple Rails & AWS Lambda Integration using Rack.](https://github.com/customink/lamby)** Details include: