improved preface qr code page

Author: thomasWeise

text/front/preface/preface.tex

@@ -55,10 +55,10 @@ \chapter*{Preface}%
 \strut\vfill\strut%
 %
 \begin{center}%
-\resizebox{\linewidth}{!}{%
-\begin{tabular}{c@{~~~~~~~~~~~~}c}%
+\noindent\resizebox{\linewidth}{!}{%
+\begin{tabular}{c@{~~~~~~~~}c}%
 \includegraphics[width=7cm]{\currentDir/bookUrl}&\includegraphics[width=7cm]{\currentDir/courseUrl}\\\relax%
-[\href{https://thomasweise.github.io/programmingWithPython/programmingWithPython.pdf}{book pdf}]&[\href{https://thomasweise.github.io/programmingWithPython}{course website}]\\%
+{\huge{[\expandafter\href{\programmingWithPythonUrl/programmingWithPython.pdf}{book pdf}]}}&{\huge{[\expandafter\href{\programmingWithPythonUrl}{course website}]}}\\%
 \end{tabular}}%
 \\[12pt]\noindent%
 \resizebox{0.85\linewidth}{!}{\expandafter\url{\programmingWithPythonUrl}}%