Update command in README

docs/run-first-validator.md

@@ -48,8 +48,14 @@
 
 - Generate LPS lockup distribution JSON file
 
-  ```
-  ~/cerc/laconicd-stack/scripts/generate-lps-lock.sh "<lps-distribution-spreadsheet-url-or-file-path>"
+  ```bash
+  #   -i, --input: Google Sheet URL or local Excel file path (required)
+  #   -d, --dir: Destination folder for the generated distribution.json file (optional, defaults to current directory)
+  #   -s, --sheet: Sheet name to read (optional, defaults to "Genesis Allocation")
+  ~/cerc/laconicd-stack/scripts/generate-lps-lock.sh \
+    -i "<lps-distribution-spreadsheet-url-or-file-path>" \
+    -d "<destination-folder-for-json-file>" \
+    -s "<sheet-name>"
   ```
 
   - This will generate the `distribution.json` file at `~/cerc/laconicd-stack/distribution.json`