Update README.md

Author: codeexpress

README.md

@@ -9,3 +9,9 @@ binary as well as in a API mode.
  - optional regex to further narrow the selection
 
 and outputs the selected value.
+
+
+Example `curl` invocation for the server mode:
+```
+curl 'http://localhost:8080/' --data-urlencode "baseUrl=http://example.com" --data-urlencode "xpath=/html/body/div/p[2]/a/@href" --data-urlencode  "regex=^(?:https?://)?(?:[^@\n]+@)?([^:/\n]+)" -vvv
+```