diff --git a/client/Dockerfile b/client/Dockerfile
index dcfff60..8ed4baf 100644
--- a/client/Dockerfile
+++ b/client/Dockerfile
@@ -22,6 +22,8 @@ RUN NODE_OPTIONS="--max-old-space-size=5250" VITE_OTEL_EXPORTER_OTLP_TRACES_ENDP
 
 FROM nginx:1.29.1-bookworm AS serve
 COPY --from=build /app/build /usr/share/nginx/html
-COPY nginx.conf /etc/nginx/conf.d/default.conf
+ENV NGINX_ENTRYPOINT_LOCAL_RESOLVERS=1
+ENV NGINX_ENVSUBST_FILTER=NGINX_
+COPY nginx.conf /etc/nginx/templates/default.conf.template
 EXPOSE 80
 CMD ["nginx", "-g", "daemon off;"]
diff --git a/client/nginx.conf b/client/nginx.conf
index 968648f..84a1ade 100644
--- a/client/nginx.conf
+++ b/client/nginx.conf
@@ -3,7 +3,8 @@ server {
     root /usr/share/nginx/html;
     index index.html;
 
-    resolver 127.0.0.11 valid=30s;
+    # Populated at container start from /etc/resolv.conf.
+    resolver ${NGINX_LOCAL_RESOLVERS} valid=30s ipv6=off;
     set $backend "http://server:8080";
 
     location ^~ /api/ {