image height

https://stackoverflow.com/questions/63464732/how-to-set-a-custom-image-height-for-an-image-in-asciidoctor

.gitignore

 /README.html
+/README.body.html
 /out
 
 # NPM README

Makefile

-README.html: README.adoc
-	bundle exec asciidoctor -o '$@' -v '$<'
+.PHONY: clean
+
+OUT = README.html
+HEAD = head.html
+BODY = README.body.html
+FOOT = foot.html
+
+$(OUT): README.adoc $(HEAD) $(FOOT)
+	bundle exec asciidoctor --embedded -o $(BODY) -v '$<'
+	cat $(HEAD) $(BODY) $(FOOT) > '$@'
+
+clean:
+	rm -rf $(OUT) $(BODY)

foot.html

+</div>
+</body>
+</html>