nginx.conf

server {
    listen 7860;
    server_name _;

    # Serve React frontend static files
    root /app/static;
    index index.html;

    # Static assets with caching
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Proxy /api/* to FastAPI backend
    location /api/ {
        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_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;

        # SSE streaming support (for /api/chat)
        proxy_buffering    off;
        proxy_cache        off;
        proxy_read_timeout 300s;
        add_header         X-Accel-Buffering no;
    }

    # MapLibre GL tiles proxy (optional: avoid CORS issues in some envs)
    location /tiles/ {
        proxy_pass https://tile.openstreetmap.org/;
        proxy_set_header Host tile.openstreetmap.org;
        expires 1d;
    }

    # React Router: all non-asset routes → index.html (SPA fallback)
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Health check
    location /health {
        return 200 "OK";
        add_header Content-Type text/plain;
    }

    # Gzip compression
    gzip on;
    gzip_types text/plain application/json application/javascript text/css;
    gzip_min_length 1024;
}