add posters

Makefile

@@ -1,5 +1,6 @@
 PAGES := index.html 404.html info.html
-SHARED_FILES := stallman.webp stallman_2024.webp favicon.ico poster.webp \
+SHARED_FILES := stallman.webp stallman_2024.webp favicon.ico \
+				poster_cz.webp poster_en.webp poster_cz.jpg poster_en.jpg \
 				moon.svg sun.svg narrow_light.svg narrow_dark.svg wide_light.svg wide_dark.svg lang_cz.svg lang_en.svg \
 				styles.css icons.css \
 				countdown.js theme.js lang.js
@@ -42,6 +43,14 @@ dst/%.js: scripts/%.js
 	@mkdir -p $(@D)
 	ln -f $< $@
 
+dst/poster_%.webp: images/poster_%.png
+	@mkdir -p $(@D)
+	magick $< -resize 2000x2000 $@
+
+dst/poster_%.jpg: images/poster_%.png
+	@mkdir -p $(@D)
+	magick $< -resize 2000x2000 $@
+
 dst/%.webp: images/%.jpg
 	@mkdir -p $(@D)
 	magick $< $@