var-dump-server: add page (#4408)

pages/common/var-dump-server.md

@@ -0,0 +1,17 @@
+# var-dump-server
+
+> Symfony dump server.
+> Collects data dumped by the Symfony VarDumper component.
+> More information: <https://symfony.com/doc/current/components/var_dumper.html#the-dump-server>.
+
+- Start the server:
+
+`var-dump-server`
+
+- Dump the data in an HTML file:
+
+`var-dump-server --format=html > {{path/to/file.html}}`
+
+- Make the server listen on a specific address and port:
+
+`var-dump-server --host {{127.0.0.1:9912}}`