Add link to use the railway template (#1383)

* Railway template link

* Typo

* Fix

docs/deploy.md

@@ -92,6 +92,15 @@ this section remain valid for other services.
 out deployment for free. You have limited computing hours, however the app will
 also automatically shutdown if it is idle.
 
+#### From the template
+
+You can just press this button to make your own deployment from the available template. This will create a fork of the Github template
+that you can then fill with your Notebooks and dependencies:
+
+[![Deploy on Railway](https://railway.app/button.svg)](https://railway.app/template/3u09WA?referralCode=jQGRe8)
+
+#### Manually
+
 The general steps for deployment at Railway can be found
 [here](https://nixpacks.com/docs/providers/python).
 High level instructions, specific to Voilà can be found below: