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# ============================================================================
# nginx config for the UI container.
#
# Two jobs:
#   1. Serve the Vite-built static assets under /
#   2. Proxy /api/* to the API container (service name "api" on the compose
#      network). This mirrors the Vite dev-server proxy in ui/vite.config.ts
#      so the frontend's fetch("/extract") calls work identically in dev and
#      in the compose stack.
# ============================================================================
server {
    listen       5173;
    server_name  _;

    # Compressed responses for text-y assets (JS, CSS, HTML, JSON).
    gzip on;
    gzip_types text/plain text/css application/json application/javascript
               application/xml+rss text/javascript image/svg+xml;
    gzip_min_length 1024;

    # Static assets — long-cache with immutable hint. Vite fingerprints
    # filenames, so a new build cache-busts automatically.
    location /assets/ {
        root /usr/share/nginx/html;
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # API proxy — strip the /api prefix so the FastAPI routes stay clean.
    # `service_healthy` in compose guarantees this backend is up before we
    # accept traffic here.
    location /api/ {
        proxy_pass         http://api: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;
        proxy_set_header   X-Forwarded-Proto $scheme;

        # Extraction can take 20-60s for large PDFs, so bump the read timeout
        # above the nginx default (60s).
        proxy_connect_timeout 10s;
        proxy_read_timeout    120s;

        # Big uploads: 10-K filings can be 5+ MB.
        client_max_body_size  20m;
    }

    # SPA fallback — any non-file route falls back to index.html so React
    # Router (or hash routing) can take over.
    location / {
        root /usr/share/nginx/html;
        index index.html;
        try_files $uri $uri/ /index.html;
    }
}