documentclass{article}

usepackage{color}

usepackage{listings}
usepackage[justification=centering]{caption}

lstdefinestyle{SC}{
    language=erlang,
    xleftmargin=.2textwidth,
    xrightmargin=.2textwidth
}

lstset{
    numbers=left,
    numberstyle=tiny,
    basicstyle=scriptsize,
    showstringspaces=false,
    showspaces=false,
    commentstyle=color{blue},
    keywordstyle=bfseriescolor{purple},
    captionpos=t,
    frame=lines
}

begin{document}

begin{lstlisting}[style=SC, caption={test}]
% Stop all containers
docker stop $(docker ps -a -q)
% Delete all containers
docker rm $(docker ps -a -q)
% Delete all images
docker rmi $(docker images -q)
end{lstlisting}

end{document}