feat(01-01): initialize Go project with HTTP server

- Go module initialized with github.com/acty/pirate-station
- HTTP server on port 32768 with root and health endpoints
- Health check verifies /data volume mount
- No external dependencies, stdlib only

internal/health/handler.go

@@ -0,0 +1,28 @@
+package health
+
+import (
+	"encoding/json"
+	"net/http"
+	"os"
+)
+
+// Handler provides a health check endpoint that verifies the data volume is mounted
+func Handler(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+
+	// Check if /data directory exists
+	if _, err := os.Stat("/data"); os.IsNotExist(err) {
+		w.WriteHeader(http.StatusServiceUnavailable)
+		json.NewEncoder(w).Encode(map[string]string{
+			"status": "unhealthy",
+			"reason": "data volume not mounted",
+		})
+		return
+	}
+
+	// All checks passed
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(map[string]string{
+		"status": "healthy",
+	})
+}