How to do I sharpen a circular saw blade?

I recently bought a this blade (I seem unable to upload a photo of it to this message) https://smile.amazon.com/Diablo-48-Tooth...

It is already a little dull and I suspect over time will only get worse as I cut A LOT of skis to make upcycled furniture. I would love to know how to sharpen the blade. I sharpen my own chainsaw blades, and I know that there is someone in town who would sharpen this saw blade. But I’d rather be self sufficient. I own a Dremel and thought maybe there is an attachment you could recommend or a file or something so I could learn how to sharpen circular saw blades. Thanks so much in advance!

Anne