How to allow access to a URL from only a selected IP

I am using Nginx on my Ubuntu 18.04 box, running OpenHAB. I am only wanting a particular IP on my network to be able to browse to any URL with '/paperui/' in the address.

My configuration files looks as follows:

server {
listen 80;
server_name mydomain_or_myip;
return 301 https://$server_name$request_uri;
}
server {
listen 443 ssl;
server_name mydomain_or_myip;

ssl_certificate /etc/letsencrypt/live/mydomain/fullchain.pem; # or /etc/ssl/openhab.crt
ssl_certificate_key /etc/letsencrypt/live/mydomain/privkey.pem; # or /etc/ssl/openhab.key
add_header Strict-Transport-Security "max-age=31536000"; # Remove if using self-signed and are having trouble.

location / {
proxy_pass http://localhost:8080/;
proxy_set_header Host $http_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;
satisfy any;
allow 192.168.0.1/24;
allow 127.0.0.1;
deny all;
auth_basic "Username and Password Required";
auth_basic_user_file /etc/nginx/.htpasswd;
}

#### When using Let's Encrypt Only ####
location /.well-known/acme-challenge/ {
root /var/www/mydomain;
}
}