fix(monthlyReport): the requested report was shifted by one month

internal/models/monthlyReport.go

@@ -58,7 +58,7 @@ func (dh *DataHandler) GetCurrentMonthlyReport(w http.ResponseWriter, r *http.Re
 
 	year, month, _ := time.Now().Date()
 
-	monthlyReport, err := dh.getMonthlyReport(year, int(month)-1)
+	monthlyReport, err := dh.getMonthlyReport(year, int(month))
 	if err != nil {
 		w.WriteHeader(http.StatusNotFound)
 		return