first things first, you want to add the domain to heroku by typing the following into the terminal, im using as an example:

$ heroku domains:add $ heroku domains:add

its a good idea to add as well as

First, purchace a google domain here.

after going through the purchace process, you want to be at a page that looks like the following:

google domains page

now go to the DNS page, should look like this:

dns page

go to the Custom Resource Records section and fill it out as follows:


lastly you want to add a subdomain forward so if someone types in it will forward them to (you need to put an @ sign in the subdomain field):

subdomain forward

it may take a while for these changes to take effect. Enjoy!