server {
    listen 80;
    server_name _;

    client_max_body_size 20M;

    # Backend API
    location /api/ {
        proxy_pass         http://backend:5000/api/;
        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 $http_x_forwarded_proto;
        proxy_connect_timeout 60s;
        proxy_send_timeout    60s;
        proxy_read_timeout    60s;
    }

    # Health check passthrough
    location /health {
        proxy_pass         http://backend:5000/health;
        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 $http_x_forwarded_proto;
    }

    # Frontend (React SPA) – catch-all
    location / {
        proxy_pass         http://frontend:80;
        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 $http_x_forwarded_proto;
        proxy_connect_timeout 60s;
        proxy_send_timeout    60s;
        proxy_read_timeout    60s;
    }
}