server {
     listen       80;
     server_name  foobar.eu;

     location / {
         proxy_pass      http://127.0.0.1:18080;
         proxy_set_header HOST $host;
         proxy_set_header X-Forwarded-Proto $scheme;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     }
     location /newsletter/ {
         rewrite /newsletter/(.*) /$1  break;
         proxy_pass      http://127.0.0.1:18081;
         proxy_set_header HOST $host;
         proxy_set_header X-Forwarded-Proto $scheme;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     }
  }