feat: CLI-Skeleton mit version/serve/check und Makefile

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NBHF4R9EAejDJUMdwr6C68

Makefile

@@ -0,0 +1,44 @@
+BINARY  := vpnportal
+PKG     := git.ravensburg.dev/cabele/opnsense-portal/cmd/vpnportal
+VERSION ?= $(shell git describe --tags --always --dirty 2>/dev/null || echo dev)
+COMMIT  ?= $(shell git rev-parse --short HEAD 2>/dev/null || echo none)
+DATE    ?= $(shell date -u +%Y-%m-%dT%H:%M:%SZ)
+LDFLAGS := -s -w -X main.version=$(VERSION) -X main.commit=$(COMMIT) -X main.date=$(DATE)
+
+# sha256sum gibt es auf macOS nicht; shasum ist dort das Äquivalent.
+SHA256 := $(shell command -v sha256sum >/dev/null 2>&1 && echo sha256sum || echo "shasum -a 256")
+
+export CGO_ENABLED := 0
+
+.PHONY: all build test race vet lint release clean
+
+all: vet test build
+
+build:
+	go build -trimpath -ldflags '$(LDFLAGS)' -o dist/$(BINARY) $(PKG)
+
+test:
+	go test ./...
+
+race:
+	go test -race ./...
+
+vet:
+	go vet ./...
+
+lint: vet
+	@test -z "$$(gofmt -l . | tee /dev/stderr)" || (echo "gofmt-Fehler: bitte 'gofmt -w .' ausführen" && exit 1)
+
+release: clean
+	@set -e; for arch in amd64 arm64; do \
+		echo "==> linux/$$arch"; \
+		mkdir -p dist/linux-$$arch; \
+		GOOS=linux GOARCH=$$arch go build -trimpath -ldflags '$(LDFLAGS)' \
+			-o dist/linux-$$arch/$(BINARY) $(PKG); \
+		cp deploy/config.example.yaml deploy/vpnportal.service README.md dist/linux-$$arch/; \
+		tar -czf dist/$(BINARY)-$(VERSION)-linux-$$arch.tar.gz -C dist/linux-$$arch .; \
+	done
+	cd dist && $(SHA256) *.tar.gz > SHA256SUMS
+
+clean:
+	rm -rf dist