Update README.md

Author: xalgord

README.md

@@ -8,6 +8,18 @@ go install github.com/xalgord/LFIgo@latest
 
 ## Usage
 
+```
+ -file string
+        File containing URLs
+  -h    Show help message (shorthand)
+  -help
+        Show help message
+  -threads int
+        Number of threads to use (default 10)
+```
+
+## Example
+
 ```
 cat urls.txt | LFIgo
 ```