main.tex

\documentclass[oneside,a4paper,13pt]{book}

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\usepackage[french]{babel}
\usepackage{blindtext}
\usepackage[utf8]{inputenc} 
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{index}
\usepackage{titlesec}



\titleformat{\chapter}[display]
  {\Huge\bfseries}
  {}
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  {\thechapter.\ }
  
 \titleformat{name=\chapter,numberless}[display]
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\begin{document}

\title{%
	Bench Test \\ 
	\large EPFL internship}
\author{Nicolas Servot}
\date{May 2020}



\maketitle

\section{Introduction}

\end{document}