\documentclass[10pt]{article}

\usepackage[paperheight=21cm,paperwidth=8cm,top=5mm,bottom=5mm,left=5mm,right=5mm]{geometry}

\include{common/packages}
\include{common/commands}

\begin{document}
	\small{
		\input{content/\jobname.tex}
	}
\end{document}