Fix Done! spacing site-wide, and EN-only content errors (Docker/Linux mixup, missing spaces, ProloNAS pun explanation)

content/en/3.serveex/9.apps/1.adguard.md

@@ -99,7 +99,7 @@ Go to `http://yourserverip:3000` and follow the setup instructions.
 The setup wizard asks you to pick an admin interface port. Keep it at `3000`: the SWAG configuration further down assumes the admin interface stays on that port, and changing it here would make exposing AdGuard with SWAG fail with a 502 error.
 ::
 
-### Done !
+### Done!
 ::
 
 That’s it! Adguard is deployed.
@@ -236,7 +236,7 @@ server {
 }
 ```
 
-### Done !
+### Done!
 ::
 
 ## Protecting AdGuard with TinyAuth