Remove default server block

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://www.unidata.ucar.edu/namespaces/thredds/InvCatalog/v1.0

                             http://www.unidata.ucar.edu/schemas/thredds/InvCatalog.1.0.6.xsd">

    <!--

        This is the default catalog that is used if no other catalogs are mounted.

        It includes a single scan element that scans the entire /data directory.

        The OPeNDAP and HTTPServer services are enabled for all files.

    -->

    <!-- Configure the available services -->

    <service name="all" serviceType="Compound" base="">

        <service name="fileserver" serviceType="HTTPServer" base="/thredds/fileServer/" />

        <service name="opendap" serviceType="OPeNDAP" base="/thredds/dodsC/" />

    add_header X-Content-Type-Options nosniff;

    # Default server block that returns 404

    server {

        listen       8080 default_server;

        listen       [::]:8080 default_server;

        server_name  _;

        return 404;

    }

    # Health-check server block that returns 204 for a special domain

    server {

        listen       8080;