docs: add make target for serving docs locally in docker

Makefile

@@ -76,6 +76,10 @@ PUBLISH_PLATFORM_ARCH := linux/amd64,linux/arm64
 # Skip image scanning by default to make building images substantially faster
 SCAN_IMAGES := false
 
+# Settings for the MKDocs serving
+MKDOCS_IMAGE ?= ghcr.io/amazeeio/mkdocs-material
+MKDOCS_SERVE_PORT ?= 8000
+
 # Init the file that is used to hold the image tag cross-reference table
 $(shell >build.txt)
 $(shell >scan.txt)
@@ -761,3 +765,12 @@ k3d/clean: local-dev/k3d
 ifeq ($(ARCH), darwin)
 	docker rm --force $(CI_BUILD_TAG)-k3d-proxy-32080 || true
 endif
+
+.PHONY: docs/serve
+docs/serve:
+	@echo "Starting container to serve documentation"
+	@docker run --rm -it \
+		-p 127.0.0.1:$(MKDOCS_SERVE_PORT):$(MKDOCS_SERVE_PORT) \
+		-v ${PWD}:/docs \
+		--entrypoint sh $(MKDOCS_IMAGE) \
+		-c 'mkdocs serve --dev-addr=0.0.0.0:$(MKDOCS_SERVE_PORT) -f mkdocs.yml'