events {}
http {
    proxy_cache_path  /data/nginx/cache  levels=1:2    keys_zone=STATIC:10m
    inactive=24h  max_size=1g;
    server {
        location ~* ^/tiles/\d[012]?/[^?]+$ {
            proxy_pass             http://portal:3000;
            proxy_set_header       Host $host:3000;
            proxy_buffering        on;
            proxy_cache_methods    GET HEAD;
            proxy_cache            STATIC;
            proxy_cache_valid      200  1d;
            proxy_cache_use_stale  error timeout invalid_header updating
                                   http_500 http_502 http_503 http_504;
        }
        location / {
            proxy_pass             http://portal:3000;
            proxy_set_header       Host $host:3000;
        }
    }
}