archy/docker/bitcoin-ui/nginx.conf

server {
    listen 8334;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    # Bitcoin RPC proxy to avoid CORS issues
    location /bitcoin-rpc/ {
        # Proxy to localhost Bitcoin RPC (using host network mode)
        proxy_pass http://127.0.0.1:8332/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Authorization "Basic __BITCOIN_RPC_AUTH__";
        add_header Access-Control-Allow-Origin *;
        add_header Access-Control-Allow-Methods "POST, GET, OPTIONS";
        add_header Access-Control-Allow-Headers "Content-Type, Authorization";
        if ($request_method = OPTIONS) {
            return 204;
        }
    }

    location / {
        try_files $uri $uri/ /index.html;
    }
}