update readme

README.md

@@ -23,6 +23,19 @@ If everything works correctly, it is possible to connect to database with :
 
 Open app on http://localhost:3000
 
+NOTE : command `npm run check-booking-changes` will check for booking changes and 
+create incidents (if needed)
+
+#### Heroku Scheduler Setup
+To setup booking change tracking, follow next steps :
+
+1. Add `Heroku Scheduler` to your app (https://elements.heroku.com/addons/scheduler)
+2. Open `Resources` tab
+3. Select `Heroku Scheduler`
+4. Click `Add Job`, tab on the right will open
+5. Select interval and for command to execute, insert `npm run check-booking-changes`
+6. Hit `Save Job`
+
 #### Useful NPM scripts
 
 There are few scripts to handle some operations faster, without copy-pasting commands to terminal