Initial creation

change name to rack-respond
adjust directory structure
edit READ.me
remove versions
create file for the gems version
make rack-respond file so user maintains naming conventions
edit gemspec file

To do's:

I need to remove all versions of the published gem, rack_health_check_gem
I need to edit this gem's name
I need to learn how to test middle ware gems locally 
You want to test your Respond class, but this is testing your mock. try something like this... 

Keep in mind that your "double" needs to be defined as the app passed to the middleware as a mock.  "env" will also need to be defined at some point too.  This test will not need it however.

respond = Rack::Respond.new(double, routes: 'ping', response: 'PONG')
expect(respond.call(env)).to eq([200, {'Content-Type' => 'text/plain'}, ['PONG'])