Add image compression

utils/compress_pdfs.sh

@@ -0,0 +1,12 @@
+cd $1
+
+for f in *.pdf; do
+    echo "Rewriting $f"
+    name="${f%.*}"
+    magick \
+        -density 200    \
+        $name.pdf       \
+        -quality 50     \
+        -flatten        \
+        $name.jpg
+done

utils/compress_pngs.sh

@@ -0,0 +1,11 @@
+cd $1
+
+for f in *.png; do
+    echo "Rewriting $f"
+    name="${f%.*}"
+    magick \
+        $name.png       \
+        -quality 50     \
+        -flatten        \
+        $name.jpg
+done