lt: add page (#4390)

pages/common/lt.md

@@ -0,0 +1,24 @@
+# lt
+
+> Localtunnel exposes your localhost to the world for easy testing and sharing.
+> More information: <https://github.com/localtunnel/localtunnel>.
+
+- Start tunnel from a specific port:
+
+`lt --port {{8000}}`
+
+- Specify the upstream server doing the forwarding:
+
+`lt --port {{8000}} --host {{host}}`
+
+- Request a specific subdomain:
+
+`lt --port {{8000}} --subdomain {{subdomain}}`
+
+- Print basic request info:
+
+`lt --port {{8000}} --print-requests`
+
+- Open the tunnel URL in the default web browser:
+
+`lt --port {{8000}} --open`