Hi @all,

for documentation.

TL;TR: set the resolver to 127.0.0.11

As described in the article: https://stackoverflow.com/questions/50121492/using-nginx-map-directive-to-dynamically-set-proxy-upstream/50122194#50122194, my problem is that apparently DNS resolution does not work in an docker environment out of the box.

If you check the article: https://www.emmanuelgautier.com/blog/nginx-docker-dns-resolution
you find the fix.

Thanks Frank