Added note to pass the client vars to client deploy fly command on every deploy.

Co-authored-by: Cameron Blackwood <38852603+Reikon95@users.noreply.github.com>

Author: Martinsos

web/docs/advanced/deployment/cli.md

@@ -277,6 +277,8 @@ or
 REACT_APP_ANOTHER_VAR=somevalue wasp deploy fly deploy
 ```
 
+Please note, you should do this for every deployment, not just the first time you set up the variables!
+
 ### Fly.io Regions
 
 > Fly.io runs applications physically close to users: in datacenters around the world, on servers we run ourselves. You can currently deploy your apps in 34 regions, connected to a global Anycast network that makes sure your users hit our nearest server, whether they’re in Tokyo, São Paolo, or Frankfurt.

web/versioned_docs/version-0.15.0/advanced/deployment/cli.md

@@ -277,6 +277,8 @@ or
 REACT_APP_ANOTHER_VAR=somevalue wasp deploy fly deploy
 ```
 
+Please note, you should do this for every deployment, not just the first time you set up the variables!
+
 ### Fly.io Regions
 
 > Fly.io runs applications physically close to users: in datacenters around the world, on servers we run ourselves. You can currently deploy your apps in 34 regions, connected to a global Anycast network that makes sure your users hit our nearest server, whether they’re in Tokyo, São Paolo, or Frankfurt.