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

content/en/3.serveex/8.development/1.code-server.md

@@ -97,7 +97,7 @@ __Note:__ Make sure to wrap the hash in single quotes `'`
 
 Deploy the container and go to `http://yourserverip:8443`. Voilà, your code-server instance is up and running in the browser!
 
-### Done !
+### Done!
 ::
 
 ::caution
@@ -221,7 +221,7 @@ server {
 
 Press :kbd{value="Ctrl+O"}, then :kbd{value="Enter"} to save, and :kbd{value="Ctrl+X"} to exit.
 
-### Done !
+### Done!
 ::
 
 That’s it! code-server is now exposed!