Makefile: support use of a non-npm version of Hugo

Makefile

@@ -1,19 +1,29 @@
-serve:
-	npx hugo server \
-		--buildDrafts \
-		--buildFuture \
-		--disableFastRender
+# To use a non-npm version of hugo, invoke make with HUGO set to your hugo command.
+# Example: make build HUGO=hugo
+
+HUGO:=npx hugo
+
+ifeq ($(DEPLOY_PRIME_URL),)
+DEPLOY_PRIME_URL:=http://localhost:8888/
+endif
+
+build:
+	$(HUGO) --cleanDestinationDir -e dev -DFE
 
 production-build:
-	npx hugo \
-		--minify
+	$(HUGO) --cleanDestinationDir --minify
 
 preview-build:
-	npx hugo \
+	$(HUGO) --cleanDestinationDir \
 		--baseURL $(DEPLOY_PRIME_URL) \
 		--buildDrafts \
 		--buildFuture \
 		--minify
 
-open:
-	open https://cncf-hugo-starter.netlify.com
+serve:
+	$(HUGO) serve \
+		--buildDrafts \
+		--buildFuture
+
+hugo-version:
+	$(HUGO) version