\documentclass{beamer}

\usepackage{ucs}
\usepackage[utf8]{inputenc}
\usepackage[french]{babel}
\usepackage[T1]{fontenc}
\usepackage{graphicx}

\title{Git c'est la vie}
\subtitle{Un cours sur cet outil magique qui s'appelle git}
\author{Francesco Bariatti}

% Put table of contents at the beginning of each section
\AtBeginSection[]
{
  \begin{frame}
    \frametitle{}
    \tableofcontents[currentsection]
  \end{frame}
}

\usetheme{CambridgeUS}
\usecolortheme{beaver}


\begin{document}

\frame{\titlepage}

\section{Prerequis}

\begin{frame}
\frametitle{Test}

Tester c'est douter
\end{frame}
\end{document}