add warning bootstrap code example
Example 1: bootstrap errors
This is a primary alert—check it out!
This is a secondary alert—check it out!
This is a success alert—check it out!
This is a danger alert—check it out!
This is a warning alert—check it out!
This is a info alert—check it out!
This is a light alert—check it out!
This is a dark alert—check it out!
Example 2: bootstrap alerts
Holy guacamole! You should check in on some of those fields below.