Grafana behind nginx: too many redirects

I'm trying to setup grafana as docker container behind Nginx using docker-compose. Any time I'm trying to reach the login page - I receive an error "Too many redirects".

Nginx config:

server {
        listen 9999 ssl;
        server_name S_NAME;

        ssl_certificate ssl/S_NAME.crt;
        ssl_certificate_key ssl/S_NAME.key;

        ssl_session_cache shared:SSL:1m;
        ssl_session_timeout  30m;

        ssl_ciphers  HIGH:!aNULL:!MD5;
        ssl_prefer_server_ciphers  on;

        root /usr/share/nginx/www;

        index index.html index.htm;

        location /grafana/ {
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header X-Forwarded-Host $host;
            proxy_set_header X-Forwarded-Server $host;

            resolver 127.0.0.11 valid=30s;

            set $grafana http://grafana:3000/;

            proxy_pass $grafana;
            rewrite  ^/grafana/(.*)  /$1 break;

            proxy_connect_timeout      30m;
            proxy_send_timeout         30m;
            proxy_read_timeout         30m;
        }
}

Docker-compose:

  grafana:
    image: grafana/grafana
    ports:
      - 3000:3000
    environment:
      GF_SECURITY_COOKIE_SECURE: "true"
      GF_SERVER_ROOT_URL: "%(protocol)s://%(domain)s/grafana/"
      GF_SERVER_DOMAIN: "test.com:9999"
    restart: on-failure

Grafana spams these logs:

lvl=info msg="Request Completed" logger=context userId=0 orgId=0 uname= method=GET path=/ status=302
lvl=info msg="Request Completed" logger=context userId=0 orgId=0 uname= method=GET path=/ status=302

As for me, nginx is redirecting all requests to /grafana, grafana redirects to /login, but I may be wrong.

I already tried different variations of GF_SECURITY_COOKIE_SECURE, GF_SERVER_ROOT_URL and GF_SERVER_DOMAIN, as well as removing sub-path /grafana from nginx and without rewrite property.

I'm using https, so GF_SECURITY_COOKIE_SECURE is needed to be set to true.

Do you have any ideas?

The error was in resolver. I've added it to make nginx up even if there is no grafana, but for some reason, it didn't work.