LaTeX document with image instead of page numbers

pagenumpics.tex

%
% A LaTeX document where images called img-1.jpg, img-2.jpg, ... are
% displayed in the corner of the page instead of a textual page number.
%
% Ben Cohen, November 2020
%

\documentclass{article}
\usepackage{lipsum}
\usepackage{graphicx}
\usepackage{fancyhdr}

\fancyhf{}
\renewcommand{\headrulewidth}{0pt}
\fancyfoot[R]{\includegraphics[width=0.5cm]{img-\thepage.jpg}} % Or L for the left corner!
%\fancyfoot[LE,RO]{\includegraphics[width=0.5cm]{img-\thepage.jpg}} % Use this instead if you want twoside
\pagestyle{fancy}

\begin{document}
\lipsum[1-23]
\end{document}