From 6daf14bc8a8c64c2f004e169984f28acd2a90824 Mon Sep 17 00:00:00 2001
From: Vincent Mrose <dev@mrose.info>
Date: Sat, 1 Aug 2026 14:40:33 +0200
Subject: [PATCH] Substring replacement failed for LISTEN_PORT

---
 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 6f7490e..fea246c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ FROM nginxinc/nginx-unprivileged:alpine-slim
 ENV REDIRECT_TARGET="https://example.com" \
     REDIRECT_CODE="301" \
     LISTEN_PORT="8080" \
-    NGINX_ENVSUBST_FILTER="REDIRECT_TARGET REDIRECT_CODE LISTEN_PORT"
+    NGINX_ENVSUBST_FILTER="LISTEN_PORT|REDIRECT_CODE|REDIRECT_TARGET"
 
 # Copy template for automatic envsubst rendering on startup
 COPY templates/default.conf.template /etc/nginx/templates/default.conf.template