\documentclass[12pt]{article}
\usepackage{fontspec}
\setmainfont{times.ttf}
\title{Sample font document}
\author{Overleaf}
\date{\today}
\begin{document}
\maketitle
This is an \textit{example} of a document compiled
with \textbf{XeLaTeX}. LuaLaTeX should also work too.
\end{document}
Console Output:
Check source code to see how to supply your own fonts to our engines.