Properly handle the DISABLE_IPV6 environment variable.

Author: jlesage

Dockerfile

@@ -147,6 +147,8 @@ RUN \
         openssl \
         apache2-utils \
         logrotate \
+        # For /opt/nginx-proxy-manager/handle-ipv6-setting
+        bash \
         # For openresty
         pcre \
         && \
@@ -202,6 +204,7 @@ RUN \
     cp -r /app/backend /opt/nginx-proxy-manager && \
     cp -r /app/frontend/dist /opt/nginx-proxy-manager/frontend && \
     cp -r /app/global /opt/nginx-proxy-manager && \
+    cp -r nginx-proxy-manager/docker/rootfs/bin/handle-ipv6-setting /opt/nginx-proxy-manager && \
     cp -r nginx-proxy-manager/docker/rootfs/etc/nginx /etc/ && \
     cp -r nginx-proxy-manager/docker/rootfs/var/www /var/ && \
     cp -r nginx-proxy-manager/docker/rootfs/etc/letsencrypt.ini /etc/ && \

rootfs/etc/cont-init.d/nginx-proxy-manager.sh

@@ -70,6 +70,10 @@ fi
 # Generate the resolvers configuration file.
 echo resolver "$(awk 'BEGIN{ORS=" "} $1=="nameserver" {print ($2 ~ ":")? "["$2"]": $2}' /etc/resolv.conf);" > /config/nginx/resolvers.conf
 
+# Hnandle IPv6 settings.
+/opt/nginx-proxy-manager/handle-ipv6-setting /etc/nginx/conf.d
+/opt/nginx-proxy-manager/handle-ipv6-setting /config/nginx
+
 # Take ownership of the config directory content.
 find /config -mindepth 1 -exec chown $USER_ID:$GROUP_ID {} \;