crush images/*.png

Makefile

@@ -1,2 +1,4 @@
+.PHONY: all
 all:
 		make -C asset
+		make -C images

images/Makefile

@@ -1,2 +1,9 @@
-all:
+.PHONY: all
+all: pngcrush
 	make -C ../asset
+
+.PHONY: pngcrush
+pngcrush: $(addprefix crushed/, $(wildcard *.png))
+
+crushed/%.png: %.png
+	pngcrush $< $@

index.html

@@ -46,7 +46,7 @@
 
 <div style="display: none" id="einladung" class="hyphenate" lang="de">
 
-  <img alt="" src="images/yuri-gagarin1.png" id="juri" width="200" height="180" />
+  <img alt="" src="images/crushed/yuri-gagarin1.png" id="juri" width="200" height="180" />
 
   <p>liebe genossinnen und genossen,<br/>
   cosmonautinnen und cosmonauten.</p>