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

content/en/3.serveex/8.development/3.it-tools.md

@@ -43,7 +43,7 @@ services:
 
 Deploy the container and visit `http://yourserverip:3222`. That’s it, your IT Tools web UI instance is up and running!
 
-### Done !
+### Done!
 ::
 
 ::caution
@@ -160,7 +160,7 @@ server {
 
 Press :kbd{value="Ctrl+O"}, then :kbd{value="Enter"} to save, and :kbd{value="Ctrl+X"} to exit.
 
-### Done !
+### Done!
 ::
 
 And that’s it! IT Tools is now exposed!