feat: build vehicle data platform and production pipeline

go/vehicle-gateway/internal/observability/logger.go

@@ -3,11 +3,28 @@ package observability
 import (
 	"log/slog"
 	"os"
+	"strings"
 )
 
 // NewLogger returns a JSON logger with a stable service field so ECS logs from
 // different Go processes can be filtered without relying on container names.
 func NewLogger(service string) *slog.Logger {
-	handler := slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{AddSource: true})
+	handler := slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
+		AddSource: true,
+		Level:     parseLogLevel(os.Getenv("LOG_LEVEL")),
+	})
 	return slog.New(handler).With("service", service)
 }
+
+func parseLogLevel(value string) slog.Level {
+	switch strings.ToLower(strings.TrimSpace(value)) {
+	case "debug":
+		return slog.LevelDebug
+	case "warn", "warning":
+		return slog.LevelWarn
+	case "error":
+		return slog.LevelError
+	default:
+		return slog.LevelInfo
+	}
+}