Fundraising

Hi
First of all I want to thank TF for hosting my project. Without the help I have gotten it would be impossible to keep going. I am disabled and living on a fixed income, so there isnt a lot of cash to spend. So far the expenses have been low, but everything in this world keeps going up.
I would like to add a "Buy me a coffee" button to the projects website. I dont think there will be a lot of money coming in but I plan on using any funds raised to pay for the domain and upgrade the very ancient computers the project uses. I just want to make sure its ok before doing so. I have uploaded one page with the button as an example, its not linked in the site. I will remove it if I am told its against the rules.
https://spins.tuxfamily.org/example.html