nginx.conf

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;

    keepalive_timeout  65;

    upstream sdf {
        server sdf:5156;
    }

    server {
        listen 8080;
        resolver 8.8.8.8 8.8.4.4 valid=300s;
        resolver_timeout 5s;
        add_header Strict-Transport-Security "max-age=63072000; includeSubdomains";
        add_header X-Frame-Options DENY;
        add_header X-Content-Type-Options nosniff;
        add_header Access-Control-Allow-Origin *;

        location / {
            root   html;
            index  index.html index.htm;
            try_files $uri $uri/ /index.html;
        }

        error_page   500 502 503 504  /50x.html;

        location = /50x.html {
          root   html;
        }

        location /api/ws {
          proxy_http_version 1.1;
          proxy_set_header Upgrade $http_upgrade;
          proxy_set_header Connection "Upgrade";
          proxy_set_header Host $host;
          proxy_pass http://sdf;
        }

        location /api {
          proxy_set_header X-Real-IP $remote_addr;
          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_set_header Host $http_host;
          proxy_set_header X-NginX-Proxy true;
          proxy_pass http://sdf;
          proxy_redirect off;
        }
    }
}