Optimizing and updating Dockerfile for build testing, size and cache.

Makefile

@@ -4,5 +4,24 @@ build-production: ## Build the production docker image.
 		--platform linux/amd64,linux/arm64/v8 \
 		--tag registry.tanshu.com/barker:latest \
 		$(if $(TAG),--tag registry.tanshu.com/barker:$(TAG)) \
+	    --pull \
 		--push \
 		git@git.tanshu.com:tanshu/barker.git
+
+.PHONY: build-check
+build-check: ## Multi-arch build without push (compile check)
+	@docker buildx build \
+		--platform linux/amd64,linux/arm64/v8 \
+		--tag barker:test \
+		--pull \
+		--progress=plain \
+		git@git.tanshu.com:tanshu/barker.git
+
+.PHONY: build-check-local
+build-check-local: ## Multi-arch build without push (compile check)
+	@git archive --format=tar HEAD | docker buildx build \
+		--platform linux/amd64,linux/arm64/v8 \
+		--tag barker:test \
+		--pull \
+		--progress=plain \
+		-