nginx.conf

server {
    listen 80;

    # Allow large file uploads (PDFs can be several MB)
    client_max_body_size 50M;

    # Docker's internal DNS resolver
    resolver 127.0.0.11 valid=10s;
    resolver_timeout 5s;

    # Serve static files
    location / {
        root /usr/share/nginx/html;
        index index.html index.htm;
        try_files $uri $uri/ /index.html;
    }

    # Proxy API requests to backend
    location /api {
        set $backend_upstream http://backend:3001;
        proxy_pass $backend_upstream;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        
        # Allow large request bodies for file uploads
        client_max_body_size 50M;
        
        # Timeouts for long-running LLM requests
        proxy_read_timeout 300s;
        proxy_connect_timeout 75s;
    }
}