nginx.conf

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

    # Gzip compression
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

    # SPA routing
    location / {
        try_files $uri $uri/ /index.html;
        add_header Cache-Control "no-cache";
    }

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

    # API proxy
    location /api {
        proxy_pass http://backend:3006;
        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;
    }
}