add makefile + .hadolint.yaml for local testing

.hadolint.yaml

@@ -0,0 +1,2 @@
+---
+ignored:

Makefile

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+dcmd = docker
+dfile = Dockerfile
+dtag = immawanderer/archlinux-cdev:testbuild
+dargs = build -t $(dtag) --no-cache --pull - < $(dfile)
+cleanargs = image rm -f $(dtag)
+pruneargs = system prune -af
+dargskaniko = run --rm -it -w=$(kanikowdir) -v $$PWD:$(kanikowdir)
+kanikoexecutorimg = gcr.io/kaniko-project/executor:v1.8.0-debug
+kanikowdir = /src
+kanikocontext = .
+kanikoargs = -f=$(dfile) -c=$(kanikocontext) --use-new-run --snapshotMode=redo --build-arg BUILD_DATE=$(build_date) --build-arg VCS_REF=$(vcs_ref) --no-push
+vcs_ref = $$(git rev-parse --short HEAD)
+build_date= $$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+hadolintimg = hadolint/hadolint
+hadolinttag = v2.9.3-alpine
+hadolintargs = run --rm -i -v $$PWD/.hadolint.yaml:/root/.config/hadolint.yaml
+
+.PHONY: hadolint build kaniko clean test prune
+
+hadolint:
+	$(dcmd) $(hadolintargs) $(hadolintimg):$(hadolinttag) < $(dfile)
+
+kaniko:
+	$(dcmd) $(dargskaniko) $(kanikoexecutorimg) $(kanikoargs)
+
+build:
+	$(dcmd) $(dargs)
+
+clean:
+	$(dcmd) $(cleanargs)
+
+test: hadolint build kaniko
+
+prune:
+	$(dcmd) $(pruneargs)