\documentclass[a4paper, ngerman]{article}
\usepackage{lmodern}
\usepackage{babel}
\usepackage{amssymb,amsmath}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{float}
\begin{document}
\thispagestyle{empty}
\begin{figure}[H]
  \includegraphics[width=\textwidth]{listings/references/fooboar.jpeg}
  \caption{Our mascot Fooboar}
  \label{img:fooboar}
\end{figure}

As you can see in Figure \ref{img:fooboar}, Fooboar has already undertaken a deep-dive into the \LaTeX{} ecosystem.
\end{document}