Merge pull request #398 from bokkoman/patch-3

Update pullio info

docs/Hardlinks/How-to-setup-for/Synology.md

@@ -271,6 +271,8 @@ At `Task Settings` tab, add the following line in the Run Command section:
    /usr/local/bin/pullio > /volume1/docker/appdata/pullio/pullio.log 2>&1
 ```
 
+It can be frustrating to test the script if no docker image updates are available, for that you can run command `sudo pullio --debug` and the script will behave as if an update is available. If you have set to receive notifications, you should receive them.
+
 More info about Pullio [HERE](https://hotio.dev/pullio/){:target="_blank" rel="noopener noreferrer"}
 
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