From e37546b795da5ec240bb2d93483b9873804aea0a Mon Sep 17 00:00:00 2001
From: Leonard Jonathan Oh <leonardjonathanoh@live.com>
Date: Wed, 26 Feb 2025 06:21:05 +0000
Subject: [PATCH] Fix (docker): Ensure nginx does not listen on ipv6 in
 ipv4-only environments

The official nginx images do not listen on ipv6, very likely to avoid nginx crashing on startup in ipv4-only environments:

```
docker run --rm -it nginx:alpine cat /etc/nginx/conf.d/default.conf | grep -i listen
```

Hence, we simply need to detect whether ipv6 is disabled, and not listen on ipv6 if ipv6 is disabled in the kernel or in the container.
---
 .docker/release/files/entrypoint.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.docker/release/files/entrypoint.sh b/.docker/release/files/entrypoint.sh
index 75e82d729..c0ed7df0c 100755
--- a/.docker/release/files/entrypoint.sh
+++ b/.docker/release/files/entrypoint.sh
@@ -9,6 +9,12 @@ UPLOAD_MAX_SIZE=${UPLOAD_MAX_SIZE:-25M}
 MEMORY_LIMIT=${MEMORY_LIMIT:-128M}
 SECURE_COOKIES=${SECURE_COOKIES:-true}
 
+# Disable listening on ipv6 for ipv4-only environments, or nginx will fail to start
+if ! ip a | grep 'inet6 ' > /dev/null; then
+    echo "[INFO] ipv6 is disabled. Configuring nginx to not listen on ipv6"
+    sed -i '/listen \[::\]:/d' /etc/nginx/nginx.conf
+fi
+
 # Set attachment size limit
 sed -i "s/<UPLOAD_MAX_SIZE>/$UPLOAD_MAX_SIZE/g" /usr/local/etc/php-fpm.d/php-fpm.conf /etc/nginx/nginx.conf
 sed -i "s/<MEMORY_LIMIT>/$MEMORY_LIMIT/g" /usr/local/etc/php-fpm.d/php-fpm.conf