umbrel/nginx/conf.d/default.conf

server {
	listen         80 default_server;
	listen         [::]:80 default_server;
	server_name _;
	root           /etc/nginx/www;
	index          index.html;
    
    location / {
	    index  index.html;
        try_files $uri $uri/ /index.html;	
    }

    location  /invoicer/ {
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        proxy_pass http://localhost:8181/api/;
    }
}