initial commit: Artifacto v0.1

Self-hosted HTML artifact publisher. Single Go binary, SQLite metadata,
HTML on disk. Features: password-protected artifacts, per-artifact expiration,
admin dashboard with view metrics (privacy-preserving daily-salt visitor hash,
sparklines, 30-day SVG chart, top referrers), rate-limited unlock endpoint.

Packaged as a Docker image (two-stage, CGO_ENABLED=0, pure-Go SQLite).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Makefile

@@ -0,0 +1,24 @@
+.PHONY: build run test docker-build docker-run tidy clean
+
+BIN := bin/artifacto
+
+build:
+	CGO_ENABLED=0 go build -ldflags="-s -w" -o $(BIN) ./cmd/artifacto
+
+run: build
+	ADMIN_PASSWORD=dev SESSION_SECRET=$$(openssl rand -hex 32) BASE_URL=http://localhost:3000 DATA_DIR=./data $(BIN)
+
+test:
+	go test ./...
+
+tidy:
+	go mod tidy
+
+docker-build:
+	docker build -t artifacto:latest .
+
+docker-run: docker-build
+	docker compose up -d
+
+clean:
+	rm -rf bin data