docs(todo): 📝 Update todo watchexec

Author: chrisguest75

59_monitor_folder/README.md

@@ -2,6 +2,10 @@
 
 Demonstrate how to monitor a folder for changes using `inotify` or `watchman`.  
 
+TODO:
+
+* add watchexec example
+
 ## Reason
 
 It's a common requirement that a process needs to monitor the output of another process via the filesystem.  File notification systems are generally OS specific.  
@@ -14,3 +18,6 @@ It's a common requirement that a process needs to monitor the output of another
 (./watchman/README.md)  
 
 ## Resources
+
+* watchexec [here](https://github.com/watchexec/watchexec)
+