nginx.conf

# Droplet nginx config
# Serves React at port 80; proxies Gradio API to localhost:7860
# Drop this file at /etc/nginx/sites-available/lumi and symlink to sites-enabled/

worker_processes 1;
error_log /var/log/nginx/error.log warn;

events { worker_connections 1024; }

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    sendfile      on;
    keepalive_timeout 65;

    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

    server {
        listen 80 default_server;

        # React build is deployed to /var/www/lumi/
        root /var/www/lumi;
        index index.html;

        # ── Gradio new REST API (gradio-client v2.x) ──────────────────────
        location /gradio_api/ {
            proxy_pass http://127.0.0.1:7860/gradio_api/;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_buffering off;
            proxy_read_timeout 300s;
        }

        # ── Gradio legacy queue / predict ─────────────────────────────────
        location /queue/ {
            proxy_pass http://127.0.0.1:7860/queue/;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;
            proxy_buffering off;
            proxy_read_timeout 300s;
        }

        location /api/ {
            proxy_pass http://127.0.0.1:7860/api/;
            proxy_http_version 1.1;
            proxy_buffering off;
            proxy_read_timeout 300s;
        }

        location /run/ {
            proxy_pass http://127.0.0.1:7860/run/;
            proxy_http_version 1.1;
            proxy_buffering off;
            proxy_read_timeout 300s;
        }

        location = /upload {
            proxy_pass http://127.0.0.1:7860/upload;
            proxy_buffering off;
        }

        location = /info   { proxy_pass http://127.0.0.1:7860/info; }
        location = /config { proxy_pass http://127.0.0.1:7860/config; }

        # ── Gradio file serving (/file=/absolute/path) ────────────────────
        location ~* "^/file=" {
            proxy_pass http://127.0.0.1:7860;
            proxy_buffering off;
            proxy_read_timeout 60s;
        }

        # ── React SPA ─────────────────────────────────────────────────────
        location / {
            try_files $uri $uri/ /index.html;
        }
    }
}