Ruby on Rails - How to set up Ahoy Gem

Im setting up Ahoy gem into my application, but there are some options that I don't understand where to add.

This is what I have done currently:

1) Added gem "ahoy_matey" to my Gem File and ran Bundle install & restarted my server

2) Added //= require jquery & //= require ahoy to my application.js

3) Ran rails generate ahoy:stores:active_record and added new tables to my database by running rake db:migrate

I also have ahoy.rb in my initializers folder.

At this point I can see that ahoy is added in my application, but not sure how to do some stuff.

I want to add Ahoy.cookie_domain = :all & Ahoy.visit_duration = 1.minute, But I don't know where to add them

AND one other issue I have is that whatever page I go to is added to my Visits table (PS: I haven't added any JS or Ruby code for tracking in any pages or controller) and as I see it ,ahoy gem tracks all events/visits in my application. I only want to track events/visits on one particular action in my whole application, posts#show action and rest don't need to be added at all.

How can I achieve this?

I want to add Ahoy.cookie_domain = :all & Ahoy.visit_duration = 1.minute, But I don't know where to add them

You add them in the initializer that you created (./config/initializers/ahoy.rb). This is precisely the purpose of files in that folder: Setting configuration values for the application to use.

whatever page I go to is added to my Visits table [...] I only want to track events/visits on one particular action in my whole application

The Gem's README says:

There are three ways to track events. [...] See Ahoy.js for a complete list of features.

So start there, and take a look at ahoy.js if you need some more advanced configuration. The gem is very flexible - you just need to read the documentation and configure it as needed.