fix: correctly set dns variable in nginx conf

Author: Christoph Bühler

gui/15-set-dns-server.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+if [ -z "$DNS_SERVER" ] && [ -f "/etc/resolv.conf" ]; then
+    echo "DNS SERVERS variable not set and resolv conf file found"
+    export DNS_SERVER=$(awk 'BEGIN{ORS=" "} $1=="nameserver" {print $2}' /etc/resolv.conf)
+    echo "DNS SERVERS: $DNS_SERVER"
+fi
+
+if [ -z "$DNS_SERVER" ] && [ ! -f "/etc/resolv.conf" ]; then
+    echo "DNS SERVERS variable not set and resolv conf file not found. Default to 8.8.8.8."
+    export DNS_SERVER=8.8.8.8
+    echo "DNS SERVERS: $DNS_SERVER"
+fi
+
+/docker-entrypoint.d/20-envsubst-on-templates.sh

gui/25-set-dns-server.sh

@@ -26,5 +26,5 @@ ENV PORT=80
 
 COPY --from=build /app/gui/dist/* /usr/share/nginx/html/
 COPY ./gui/nginx.conf /etc/nginx/templates/default.conf.template
-COPY ./gui/15-set-dns-server.sh /docker-entrypoint.d/15-set-dns-server.sh
-RUN chmod +x /docker-entrypoint.d/15-set-dns-server.sh
+COPY ./gui/25-set-dns-server.sh /docker-entrypoint.d/25-set-dns-server.sh
+RUN chmod +x /docker-entrypoint.d/25-set-dns-server.sh