Add documentation to the make file

Thanks to this excellent article[1] I can now type in ‘make’ to be reminded of
what commands I have available.

[1]: https://victoria.dev/blog/how-to-create-a-self-documenting-makefile/

GNUmakefile

@@ -1,8 +1,11 @@
-.PHONY: publish deploy html css
+.PHONY: publish deploy html css help
 
-publish: html css
+help:							## Show this help
+	@egrep -h '\s##\s' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'
 
-deploy:
+publish: html css		  ## Build the site and copy it to the staging directory
+
+deploy:							## Deploy the site to live
 	@[[ -e public/index.html ]] || (echo "Run make publish before deploy" && exit 1)
 	rsync --rsh="ssh -p 4511" --verbose --checksum --recursive --delete \
 	    --exclude '*~' --exclude '.eldev' --delete-excluded \
@@ -22,7 +25,7 @@ public/assets/css/main.css public/assets/css/tekuti.css public/assets/css/cgit.c
 public/assets/css/%.css: src/less/%.less
 	lessc $< $@
 
-clean:
+clean:							## Remove all of the build files
 	@echo "Cleaning up..."
 	@rm -rvf *.elc
 	@rm -rvf public