Implement new margin and font size standard based on recent printing tests.

ebook.md

@@ -1,7 +1,7 @@
 ---
 # Font sizes can only be 10pt-12pt (https://pandoc.org/MANUAL.html#fonts)
-fontsize: "11pt"
-geometry: "margin=1in"
+fontsize: "12pt"
+geometry: "margin=0.5in"
 
 #title-meta: "Template Project"
 date-meta: "\\date{\\today}"