\begin{figure}
    \centering
    \begin{minipage}{0.45\textwidth}
        \centering
        \includegraphics[width=0.9\textwidth]{ScreenShot/HubApp.png} % first figure itself
        \caption{\label{bacASable} Page d'accueil bac à sable}
    \end{minipage}\hfill
    \begin{minipage}{0.45\textwidth}
        \centering
        \includegraphics[width=0.9\textwidth]{ScreenShot/Code.png} % second figure itself
        \caption{\label{code} Page d'accueil code JAVA}
    \end{minipage}
\end{figure}