This is the configuration, which I am currently using in NPM for Pi-Hole 6:
location / {
proxy_pass http://192.168.2.12:80/admin/;
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_hide_header X-Frame-Options;
proxy_set_header X-Frame-Options "SAMEORIGIN";
proxy_read_timeout 90;
}
location /admin/ {
proxy_pass http://192.168.2.12:80/admin/;
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_hide_header X-Frame-Options;
proxy_set_header X-Frame-Options "SAMEORIGIN";
proxy_read_timeout 90;
}
location /api/ {
proxy_pass http://192.168.2.12:80/api/;
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_hide_header X-Frame-Options;
proxy_set_header X-Frame-Options "SAMEORIGIN";
proxy_read_timeout 90;
}