Add any fonts that you may want to use within themes to this directory. They can be in ttf, woff or woff2 format.
Within your CSS include the font with:
@font-face{font-family:'Your Font Name';font-style:normal;font-weight:normal;font-display:swap;src:url('./fonts/yourfont.woff2')format('woff2'),url('./fonts/yourfont.woff')format('woff'),url('./fonts/yourfont.ttf')format('truetype');}