How to use custom font

[avocadolabsrepo]

Hey,
I have been trying to add a custom font to the generated PDF. But it seems like not working.

I downloaded the font and passed it to the CSS as a base64 string. It didn't work.
@font-face {
font-family: 'Poppins';
src: url('data:font/truetype;charset=utf-8;base64,{{fontPopins}}');
font-weight: normal;
font-style: normal;

    }

Then I tried to load directly from the local file, but it also didn't work.
{
font-family: 'Poppins';
src: url('./Poppins-Regular.ttf') format('truetype');;
font-weight: normal;
font-style: normal;
}
Kindly let me know what I'm doing wrong