How can I edit the order confirmation email to link to the tracking page?

[Charliefowler]

I’m trying to change a link in my order confirmation email, instead of going to the shop url, which I can see in the code is shop.url, I want it to go to the order tracking page but as far as I can see there is no liquid variable for that page and pasting the link does not work. How do I do this? Thanks.