Run local markdown tests inside an isolated container

Signed-off-by: Feruzjon Muyassarov <feruzjon.muyassarov@intel.com>

Makefile

@@ -12,8 +12,6 @@ BUILDER_IMAGE ?= golang:1.18-buster
 BASE_IMAGE_FULL ?= debian:buster-slim
 BASE_IMAGE_MINIMAL ?= gcr.io/distroless/base
 
-MDL ?= mdl
-
 # Docker base command for working with html documentation.
 # Use host networking because 'jekyll serve' is stupid enough to use the
 # same site url than the "host" it binds to. Thus, all the links will be
@@ -157,7 +155,12 @@ lint:
 	golint -set_exit_status ./...
 
 mdlint:
-	find docs/ -path docs/vendor -prune -false -o -name '*.md' | xargs $(MDL) -s docs/mdl-style.rb
+	${CONTAINER_RUN_CMD} \
+	--rm \
+	--volume "${PWD}:/workdir:ro,z" \
+	--workdir /workdir \
+	ruby:slim \
+	/workdir/scripts/test-infra/mdlint.sh
 
 helm-lint:
 	helm lint --strict deployment/helm/node-feature-discovery/

scripts/test-infra/mdlint.sh

@@ -2,6 +2,5 @@
 
 # Install mdl
 gem install mdl -v 0.11.0
-
 # Run verify steps
-make mdlint
+find docs/ -path docs/vendor -prune -false -o -name '*.md' | xargs mdl -s docs/mdl-style.rb