tutorials: improve theme + use pandoc 2

tutorial/docker-advanced/Makefile

@@ -1,19 +1,6 @@
+include ../pandoc-opts.mk
+
 SOURCES		= tutorial.md setup.md what.md manual.md compose.md security.md rendu.md
-PANDOCOPTS	= --latex-engine=xelatex \
-		  --standalone \
-		  --normalize \
-		  --number-sections \
-		  --smart \
-		  -M lang=fr-FR \
-		  -M fontsize=12pt \
-		  -M papersize=a4paper \
-		  -M mainfont="Linux Libertine O" \
-		  -M monofont="FantasqueSansMono-Regular" \
-		  -M sansfont="Linux Biolinum O" \
-		  -M colorlinks=true \
-		  -M linkcolor="black" \
-		  -M urlcolor="[rgb]{0.2,0.6,0.4}" \
-		  --include-in-header=../header.tex
 
 
 all: tutorial.pdf