From 171b3306c9e807fe39bdff59c2a5b54431ed5c96 Mon Sep 17 00:00:00 2001
From: Romain THERRAT <romain@pockost.com>
Date: Thu, 23 Jan 2025 18:34:57 +0100
Subject: [PATCH] Forward original Host header to upstream

This commit use a "hack" in order to prevent the $host var to be
substitute by envsubst.
---
 auth.conf | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/auth.conf b/auth.conf
index aaebd2e..e885bfb 100644
--- a/auth.conf
+++ b/auth.conf
@@ -7,5 +7,8 @@ server {
 
      proxy_pass                          http://${FORWARD_HOST}:${FORWARD_PORT};
      proxy_read_timeout                  900;
+     # Forward Host header
+     # ${no_value} is a hack to bypass envsubst substitution
+     proxy_set_header Host      $${no_value}host;
  }
 }