Merge pull request #8 from riku22/disable_ipv6

Disable ipv6 lookup on resolver

Author: githubsaturn

default.conf

@@ -8,7 +8,7 @@ server {
     # 127.0.0.11 is DNS set up by Docker, see:
     # https://docs.docker.com/engine/userguide/networking/configure-dns/
     # https://github.com/moby/moby/issues/20026
-    resolver $RESOLVERS valid=10s;
+    resolver $RESOLVERS valid=10s ipv6=off;
     set $upstream $UPSTREAM_HTTP_ADDRESS;
 
     location / {