diff --git a/README.md b/README.md
index 2cfd080..eb5472f 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,10 @@ showing the file tree, individual files (with syntax highlighting), raw
 content, blame, commit log and arbitrary objects. Only the **default branch**
 and **committed content** are shown — the working directory is never read.
 
+## Preview
+
+See https://repos.poulsander.com/ for an example of how it looks.
+
 ## Routes
 
 | URL | Shows |
@@ -47,6 +51,9 @@ default branch HEAD.
   repository's page, e.g. `github.mycompany.com git.example.org`. Overridden by
   the `GITHUB_ENTERPRISE_HOSTS` environment variable. `github.com` is always
   recognised, so leave this empty unless you run GitHub Enterprise.
+- `git.allow_clone` — whether to serve `git clone` over HTTP. Overridden by the
+  `ALLOW_GIT_CLONE` environment variable ("1" to enable); disabled by
+  default.
 - `SHOW_EMAILS` (env) — author/committer email addresses are hidden by default;
   set `SHOW_EMAILS=1` to show them.