server {
    listen 443 ssl;
    listen [::]:443 ssl http2;
    server_name DOMAIN;

    # Enable gzip but do not remove ETag headers
    gzip on;
    gzip_vary on;
    gzip_comp_level 4;
    gzip_min_length 256;
    gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
    gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;

    # Allow unlimited download size
    client_max_body_size 0;

    fastcgi_buffers 64 4K;

    # Remove X-Powered-By, which is an information leak
    fastcgi_hide_header X-Powered-By;

    # Recommended in Nextcloud overview
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

    location / {
        proxy_pass http://nextcloud_app_1:80/;

        proxy_pass_request_headers on;

        proxy_set_header Host              $host;
        proxy_set_header X-Forwarded-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;

        # All recommended in security overview
        proxy_set_header Referrer-Policy                   "no-referrer" ;
        proxy_set_header X-Content-Type-Options            "nosniff" ;
        proxy_set_header X-Download-Options                "noopen" ;
        proxy_set_header X-Frame-Options                   "SAMEORIGIN" ;
        proxy_set_header X-Permitted-Cross-Domain-Policies "none" ;
        proxy_set_header X-Robots-Tag                      "none" ;
        proxy_set_header X-XSS-Protection                  "1; mode=block" ;
    }

    
    # Needed to make CalDAV and CardDAV work properly
    location /.well-known/carddav {
        return 301 $scheme://$host/remote.php/dav;
    }

    location /.well-known/caldav {
        return 301 $scheme://$host/remote.php/dav;
    }
}