nginx.conf

server {
    listen 7860 default_server;
    server_name _;
    client_max_body_size 4m;

    # SSE / streaming build endpoint needs buffering off + long timeout
    location /api/lean/build {
        proxy_pass http://127.0.0.1:8000;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_buffering off;
        proxy_cache off;
        proxy_read_timeout 3600s;
        add_header X-Accel-Buffering no;
    }

    location / {
        proxy_pass http://127.0.0.1:8000;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_read_timeout 120s;
    }
}