Added create contact ednpoint

controllers/invoices_controller.go

@@ -53,8 +53,10 @@ func GetInvoiceByID(c *gin.Context) {
         return
     }
 
+	invoiceResponses := models.ConvertInvoiceToResponse(invoices)
+
     if len(invoices) > 0 {
-        c.JSON(http.StatusOK, gin.H{"data": invoices[0]})
+        c.JSON(http.StatusOK, gin.H{"data": invoiceResponses[0]})
     } else {
         c.JSON(http.StatusNotFound, gin.H{"error": "Invoice not found"})
     }