update master to generate docs like rancher.github.io does

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>

docs/Makefile

@@ -0,0 +1,27 @@
+.PHONY: default build build-nginx run live
+
+default: build build-nginx run
+
+# this target sets up Jekyll, and uses it to build html
+build:
+	docker build -t rancher/rancher.github.io:build -f Dockerfile.build .
+
+# this target uses the Jekyll html image in a multistage Dockerfile to build a small nginx image
+build-nginx:
+	docker build -t rancher/rancher.github.io .
+
+run: build-nginx
+	docker run --rm -p 80:80 rancher/rancher.github.io
+
+# this target will use the jekyll image and bind mount your local repo, when you modify a file, the html will be automatically rebuilt. (the redirects from latest won't work)
+# You can also examine the output html in the _sites dir.
+live:
+	docker run --rm -it -p 80:4000 \
+		-v $(PWD)/os:/build/os/v1.0/en \
+		-v $(PWD)/_site:/build/_site \
+		rancher/rancher.github.io:build jekyll serve -w -P 4000 --incremental
+
+clean:
+	rm -rf _sites
+	docker rmi rancher/rancher.github.io
+	docker rmi rancher/rancher.github.io:build