docs: update port forwarding to state it works without a wildcard with tunnel

sharkymark · ghuntley · commit dcf982bb915e · 2022-11-09T08:46:24.000Z
diff --git a/docs/networking/port-forwarding.md b/docs/networking/port-forwarding.md
@@ -45,7 +45,11 @@ For more examples, see `coder port-forward --help`.
 ## Dashboard
 
 > To enable port forwarding via the dashboard, Coder must be configured with a
-> [wildcard access URL](../admin/configure.md#wildcard-access-url).
+> [wildcard access URL](../admin/configure.md#wildcard-access-url). If an access
+> URL is not specified, Coder will create [a publicly accessible
+> URL](../admin/configure#tunnel) to reverse proxy the deployment, and port
+> forwarding will work. There is a known limitation where if the port forwarding
+> URL length is greater than 63 characters, port fordwarding will not work.
 
 ### From an arbitrary port
 
