Update hassio_addon_tutorial.md (#424)

* Update hassio_addon_tutorial.md

* ✏️ Tweak

Co-authored-by: Franck Nijhof <frenck@frenck.nl>
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Franck Nijhof 2020-03-05 09:28:41 +01:00 committed by GitHub
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@ -56,6 +56,8 @@ CMD [ "/run.sh" ]
`run.sh`:
```shell
#!/usr/bin/with-contenv bashio
echo Hello world!
```
Make sure your editor is using UNIX-like line breaks (LF), not Dos/Windows (CRLF).