From 0dab6304c75b93ad256791539909b68bc8d8b6ed Mon Sep 17 00:00:00 2001
From: karlicoss <karlicoss@gmail.com>
Date: Wed, 6 Sep 2023 02:35:17 +0100
Subject: [PATCH] readme: SETTING_EXTERNAL_HOST needs to contain a top level
 domain

Without it (e.g. if it's a dotless domain name like `mycomputer`), this results in an Internal Server Error page due to this line https://github.com/zulip/zulip/blob/81bd63cb46273b8c94ef9e92c00893ed97110119/zerver/models.py#L4904
---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 562dc2e5c3..30f3d19348 100644
--- a/README.md
+++ b/README.md
@@ -119,6 +119,8 @@ discussion in the main [Zulip installation docs][install-normal]):
 - `SETTING_EXTERNAL_HOST`: The hostname your users will use to
   connect to your Zulip server. If you're testing on your laptop,
   the default of `localhost.localdomain` is great.
+  Note that it needs to contain a top level domain to work, e.g.
+ `mycomputer.lan`.
 - `SETTING_ZULIP_ADMINISTRATOR`: The email address to receive error
   and support emails generated by the Zulip server and its users.