server {
    listen 80;

    root /usr/share/nginx/html;
    index index.html;

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

    # Backend API
    location /api/ {
        proxy_pass http://backend:3001;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    # Socket.IO WebSocket proxying
    location /socket.io/ {
        proxy_pass http://backend:3001;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        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;
    }

    location /avatar/ {
        proxy_pass http://backend:3001/avatar/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_hide_header Content-Type;
        add_header Cache-Control "public, max-age=3600";
    }
}
