server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # Frontend SPA routing
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Proxy /api requests to localhost backend
    location /api/ {
        proxy_pass http://127.0.0.1:8001/api/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header X-Forwarded-Proto $scheme;
    }

    # Proxy websockets/docs if needed
    location /docs {
        proxy_pass http://127.0.0.1:8001/docs;
    }
    
    location /openapi.json {
        proxy_pass http://127.0.0.1:8001/openapi.json;
    }

    # Cache static assets
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }
}