Solved it, I decided to give one last shot before doing an Iframe within html, very happy I did.
Here, for the record, is how to do a reverse proxy with nginx with raspbian:
sudo apt install nginx
cd /etc/nginx/sites-available
sudo nano reverse-proxy.conf
#Paste the following
server {
listen 3000;
listen [::]:3000;
location / {
proxy_pass http://localhost:1880/ui/;
}
}
sudo ln -s /etc/nginx/sites-available/reverse-proxy.conf /etc/nginx/sites-enabled/reverse-proxy.conf
sudo systemctl start nginx
sudo systemctl enable nginx
#Command to see what ports are now open
netstat -tupln
#use ngrock
./ngrok http -auth='username:password' -region au 3000