Set resolver for nginx.

template/nginx.conf

@@ -27,5 +27,7 @@ http {
 
     gzip on;
 
+    resolver 127.0.0.11 ipv6=off valid=10s;
+
     include /etc/nginx/conf.d/*.conf;
 }

template/pipedfrontend.conf

@@ -2,8 +2,10 @@ server {
     listen 80;
     server_name FRONTEND_HOSTNAME;
 
+    set $backend "http://pipedfrontend:80";
+
     location / {
-        proxy_pass http://pipedfrontend:80;
+        proxy_pass $backend;
         proxy_http_version 1.1;
         proxy_set_header Connection "keep-alive";
     }