website: add simple makefile for testing locally

Something like: `cd website && make serve`

Then you can open <http://localhost:1313/>

Signed-off-by: Anders F Björklund <[email protected]>

Author: afbjorklund

website/Makefile

@@ -0,0 +1,12 @@
+# See also: package.json
+NPM ?= npm
+
+build serve: _output/docsy
+	$(NPM) run $@
+
+_output/docsy:
+	$(MAKE) -C .. docsy
+
+clean:
+	$(NPM) run $@
+	rm -Rf _output