corrects pagination. adds bash file for merge of the final pdf.

main.tex

@@ -1,4 +1,4 @@
-\documentclass[10pt]{article}
+\documentclass[9pt,twoside]{article}
 \usepackage[utf8]{inputenc}
 \usepackage[T1]{fontenc}
 \usepackage[textwidth=12cm,centering]{geometry}
@@ -18,24 +18,43 @@
 \pagestyle{empty}
 \pagecolor{bg}
 
-\begin{document}
+\usepackage{geometry} % https://www.overleaf.com/learn/latex/Page_size_and_margins
+\geometry{
+	layout=a5paper,
+	paperheight=216mm,
+	paperwidth=154mm,
+	layoutvoffset=3mm,
+	layouthoffset=3mm,
+	bindingoffset=15mm,
+	margin=3mm,
+	showframe=false,
+	showcrop=false,
+	right=9mm,
+	left=6mm,
+	top=9mm,
+	bottom=9mm
+}
 
-\illupage{illus_09_55_008-upscale-alpha-crop-sm.png}
+\begin{document}
+\newpage
+\PageBackground{\bgr}
+blablabla
+\clearpage
+\illupage{\bgl}{illus_09_55_008-upscale-alpha-crop-sm.png}
 \include{pages/soli.tex}
 \include{pages/kaffee.tex}
-\illupage{illus_09_36_358-upscale-alpha-crop-sm.png}
+\illupage{\bgr}{illus_09_36_358-upscale-alpha-crop-sm.png}
 \include{pages/zeitungen.tex}
 \include{pages/teekakao.tex}
 \include{pages/erfrischung.tex}
-\illupage{illus_16_63_003-upscaled-crop-alpha2.png}
+\illupage{\bgr}{illus_16_63_003-upscaled-crop-alpha2.png}
 \include{pages/bier.tex}
 \include{pages/wein.tex}
 \include{pages/longdrinks.tex}
 \include{pages/cocktails.tex}
-\illupage{illus_16_58_001-upscale-alpha2-crop2.png}
+\illupage{\bgl}{illus_16_58_001-upscale-alpha2-crop2.png}
 \include{pages/spirituosen.tex}
 \include{pages/spirituosen2.tex}
-\illupage{adver_10_14_163-upscaled2-alpha.png}
+\illupage{\bgr}{adver_10_14_163-upscaled2-alpha.png}
 \include{pages/backcover.tex}
-
 \end{document}