\setmainfont{Rubik-Regular.ttf}[Path = fonts/,
    BoldFont = Rubik-Bold.ttf,
    ItalicFont = Rubik-Italic.ttf
]

\setsansfont{OpenSans-Regular.ttf}[Path = fonts/,
    BoldFont = OpenSans-Bold.ttf,
    ItalicFont = OpenSans-Italic.ttf
]