BOOKFILE=$DOCS_DIR/../book.json
TITLE=$(grep '"title":' $BOOKFILE | cut -d'"' -f 4)
-SUBTITLE=""
+SUBTITLE=$(grep '"subtitle":' $BOOKFILE | cut -d'"' -f 4)
VERSION="Version $(grep '"version":' $BOOKFILE | cut -d'"' -f 4)"
DATE=$(grep '"published":' $BOOKFILE | cut -d'"' -f 4)
cat $(dirname $0)/cover.svg | sed -e "s/{title}/$TITLE/g" \
-e "s/font-size:87.5px/font-size:54px/g" \
-e "s/{subtitle}/$SUBTITLE/g" \
+ -e "s/font-size:62.5px/font-size:40px/g" \
-e "s/{version}/$VERSION/g" \
-e "s/{date}/$DATE/g" \
> /tmp/cover.svg