added curl samples

Sample-Usage.md

@@ -0,0 +1,25 @@
+# Sample REST API usage with cUrl
+
+## Get a customer
+
+```bash
+curl -s -k -X GET https://localhost:5001/customer/121
+```
+
+## Create new customer
+
+```bash
+curl -s -k -H "Content-Type: application/json" -X PUT https://localhost:5001/customer -d '{"CustomerName": "John Doe", "PhoneNumber": "123-234-5678", "FaxNumber": "123-234-5678", "WebsiteURL": "http://www.something.com", "Delivery": { "AddressLine1": "One Microsoft Way", "PostalCode": 98052 }}'
+```
+
+## Update customer
+
+```bash
+curl -s -k -H "Content-Type: application/json" -X PATCH http://localhost:5000/customer/123 -d '{"CustomerName": "Jane Dean", "PhoneNumber": "231-778-5678" }'
+```
+
+## Delete a customer
+
+```bash
+curl -s -k -X DELETE http://localhost:5000/customer/123
+```