Change logo.svg after it's deployed to heroku hows?

I finished part 3 tutorial and my shopping cart is working and is posted at: buyway-prod.herokuapp.com

I want to change the logo.svg file that shows up as “Mosh Buy” “don’t worry we have it”.

Also want to learn to be able to do this and also move to another server yet that for another day.

Anyone getting this far want to help please?