Setup and run go linters

backend/cmd/server/main.go

@@ -24,7 +24,11 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	defer database.Close()
+	defer func() {
+		if err := database.Close(); err != nil {
+			log.Printf("Error closing database: %v", err)
+		}
+	}()
 
 	// Workdir
 	workdir := os.Getenv("NOVAMD_WORKDIR")