Add hugo serve target

Makefile

@@ -12,9 +12,14 @@
 #
 #-----------------------------------------------------------------------------#
 
+SHELL = /usr/bin/bash
+
 DEST ?= axs@sdf.org:html
 SITE_URL ?= https://axs.sdf.org
 
+HUGO_SERVE_FLAGS ?= --buildDrafts
+hugo_serve_cmd = hugo server ${HUGO_SERVE_FLAGS}
+
 help_generator = generate-help.awk
 
 #-----------------------------------------------------------------------------#
@@ -55,6 +60,17 @@ publish: build #> Publish site
 	@echo "✓ Publising complete"
 	@echo "\nThe site should be available on ${SITE_URL}"
 
+serve: #> Start a Hugo server
+	@if [[ -z $${TMUX} ]]; \
+	then \
+	  echo not tmux; \
+	else \
+	  echo Starting a Hugo server in a new Tmux window; \
+	  tmux neww ${hugo_serve_cmd}; \
+	fi
+
+
+
 help: #> Generate this help message
 	@gawk -f ${help_generator} $(MAKEFILE_LIST)