Add flags ti run command page

Author: angelofenoglio

Diff for: docs/user-guide/leverage-cli/reference/run.md

@@ -22,4 +22,21 @@ leverage run task1 task2[arg1,arg2] task3[arg1,kwarg1=val1,kwarg2=val2]
 
 * `task2` receives two positional arguments `arg1` and `arg2`
 
-* `task3` receives one positional argument `arg1` and two keyworded arguments `kwarg1` with value `val1` and `kwarg2` with value `val2`
+* `task3` receives one positional argument `arg1` and two keyworded arguments `kwarg1` with value `val1` and `kwarg2` with value `val2`
+
+### Options
+* `-f` | `--filename`:  Name of the file containing the tasks' definition. Defaults to `build.py`
+* `-l` | `--list-tasks`: List all the tasks defined for the project along a description of their purpose (when available).  
+  ```
+  Tasks in build file `build.py`:
+
+    clean                  	Clean build directory.
+    copy_file              	
+    echo                   	
+    html                   	Generate HTML.
+    images        [Ignored]	Prepare images.
+    start_server  [Default]	Start the server
+    stop_server            	
+
+  Powered by Leverage 1.13.0
+  ```