P5-4450 save Pwinty order data

docs/orders.md

@@ -0,0 +1,13 @@
+# Orders
+
+## Update pwinty_id
+
+```
+curl -X POST https://api2.photowall.com/orders/1/pwinty_id -H "Content-Type: application/json" -d '{"value": 123}'
+```
+
+## Update pwinty_image_id
+
+```
+curl -X POST https://api2.photowall.com/order-rows/1/pwinty_image_id -H "Content-Type: application/json" -d '{"value": 123}'
+```