update readme

README.md

@@ -1,2 +1,14 @@
 # be-accone
 
+## Generate payment instruction cicilan
+### curl command
+`
+curl -s -X POST "https://accone.aplikasi.web.id/one-api/mockup/scheduler/PurchaseInvoiceInstallment/GenerateMonthlyInvoices" \
+     -H "Content-Type: application/json" \
+     -d '{}'
+`
+
+### response 
+`
+{"status":"OK","data":{"startDate":"2026-07-01","endDate":"2026-07-31","totalEligible":1,"totalInserted":1,"created":[{"installmentID":6,"contractID":"11","purchaseOrderID":"20","parentInvoiceID":"16","parentInvoiceNumber":"PI-016\/SDM-14\/SM-1\/VII\/2026","amount":5000000,"installDate":"2026-07-22","dueDate":"2026-07-29"}]}}
+`