改进论文模板

Question

我根据大学提供的指南为我的硕士论文制作了这个模板。这个模板的问题似乎很脆弱，有很多警告，最轻微的修改都会破坏一些东西。你能建议我如何根据这些建议来增强这个模板吗指南？

\documentclass[twoside, 14pt]{extreport}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{subfiles}
\graphicspath{{images/}}
\usepackage[a4paper,left=30mm,right=10mm,top=20mm,bottom=25mm,bindingoffset=6mm, verbose=true]{geometry}
\usepackage{fancyhdr}
\usepackage{lipsum}
\pagestyle{fancy}
\usepackage[document]{ragged2e}
\usepackage[backend=biber,bibstyle=ieee,citestyle=numeric-comp]{biblatex}
%\usepackage[sorting=none]{biblatex}
\usepackage{url}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage[toc,page]{appendix}
\usepackage{ragged2e}

\usepackage{bera}% optional: just to have a nice mono-spaced font
\usepackage{listings}
\usepackage{xcolor}


%\usepackage{microtype}
\addbibresource{~/Documents/Thesis/XXX/references.bib}
\title{
    {XXX}\\
    {\Large University YYY}\\
    {\includegraphics{YYY_logo.jpg}}
}

\author{John doe}
\date{Day Month Year}

\DeclareUnicodeCharacter{2212}{-}
\begin{document}

\justifying
\maketitle
\chapter*{\centering{Abstract}}
\subfile{chapters/abstract.tex}

\chapter*{\centering{Dedication}}

\chapter*{\centering{Declaration}}

\chapter*{\centering{Acknowledgement}}

\tableofcontents

\chapter*{\centering{Introduction}}
\subfile{chapters/introduction.tex}

\chapter{chapter 1}
\subfile{chapters/chapter_1.tex}
\chapter{chapter 2}
\subfile{chapters/chapter_2.tex}


\chapter*{Conclusion}
\subfile{chapters/conclusion.tex}

\appendix
\subfile{chapters/appendix.tex}
\printbibliography