www: saner handling of zip excludes

esp32/Makefile

@@ -31,12 +31,11 @@ $(TARGET): $(shell find $(SKETCH) -type f) $(GENFILES)
 		$(ARDUINO_CLI) compile $(ARDUINO_OPTS)
 
 .PHONY: zip
-zip:
+zip: zipexclude
 	mkdir -p zip
 	cd www && \
 		TZ=GMT0 \
-		$(ZIP) -9DrpX -FS ../zip/www.zip . \
-			-x '.*' -x '#*' -x '*~' -x '*.bak'
+		$(ZIP) -9DrpX -FS ../zip/www.zip . -x@../zipexclude
 
 # Ugly hack but needed to avoid unnecessary rebuilds
 www.zip: zip

esp32/zipexclude

@@ -0,0 +1,5 @@
+*#
+.*
+*~
+*.bak
+*.$$$