purpose of the public directory in a ruby app? -

purpose of the public directory in a ruby app? -

i'm new ruby. installed phusion passenger , it's working apache2 on ubuntu.

i've followed tutorial: https://www.phusionpassenger.com/documentation/users%20guide%20apache.html#_tutorial_example_writing_and_deploying_a_hello_world_rack_application

what i'm wondering public directory for? tried putting home.ru had puts "hello world" . when did that, going browser @ http://localhost:81/home.ru printed puts "hello world" instead of hello world. public directory meant server side scripts @ all? if so, doing wrong?

thanks

the public directory phone call static files. served as-is web server without kind of processing, , cached browser.

for example, if wanted create web page without kind of dynamic content, drop html , css files there , straight accessible, home.ru file was.

here's documentation rack::static.

ruby