chore: add gh-pages target

Makefile

@@ -11,6 +11,7 @@ RMD=$(wildcard $(SECTIONDIR)/*.Rmd)
 
 DATE=$(shell date +'%Y%m%d')
 GITHEAD=$(shell git rev-parse --short HEAD)
+GITHEADL=$(shell git rev-parse HEAD)
 
 .DELETE_ON_ERROR:
 
@@ -59,6 +60,18 @@ regenerate-data: \
 		shell --manifest=guix/manifest-data-preparation.scm -- \
 		Rscript data/scripts/01-anonymize-and-prepare.R
 
+gh-pages: manuscript
+	git checkout gh-pages
+	sed 's#</h4>#</h4> \
+<div style="background-color: \#ffc107; padding: 10px; text-align: center;"> \
+<strong>This manuscript is work-in-progress!</strong><br /> \
+Please find details at <a href="https://github.com/umg-minai/crt">https://github.com/umg-minai/crt</a>.<br /> \
+Manuscript date: $(shell date +"%Y-%m-%d %H:%M"); Version: <a href="https://github.com/umg-minai/crt/commit/$(GITHEADL)">$(GITHEAD)</a> \
+</div>#' $(OUTPUTDIR)/$(MANUSCRIPT).html > index.html
+	git add index.html
+	git commit -m "chore: update index.html"
+	git checkout main
+
 clean: clean-dist clean-output
 
 clean-dist: