Nginx Wordpress configuration issue on Ubuntu guest and Virtualbox

Question

I have updated the question based on the suggestion from @Gerard H. Pille below.

First time setting this up. I have Virtualbox running Ubuntu 18.04 on a Win 10 host for a wordpress project.

My shared folder is mounted in /media/sw_wp and working

My projects folder contains one project only, at /media/wp_sf/myproj

I am using this nginx config from here:

# Upstream to abstract backend connection(s) for php
upstream php {
        server unix:/tmp/php-cgi.socket;
        server 127.0.0.1:9000;
}

server {
        ## Your website name goes here.
        server_name myproj.com.au;

        ## Your only path reference.
        root /var/www/html/myproj;

        ## This should be in your http block and if it is, it's not needed here.
        index index.php;

        location = /favicon.ico {
                log_not_found off;
                access_log off;
        }

        location = /robots.txt {
                allow all;
                log_not_found off;
                access_log off;
        }

        location / {
                # This is cool because no php is touched for static content.
                # include the "?$args" part so non-default permalinks doesn't break when using query string
                try_files $uri $uri/ /index.php?$args;
        }

        location ~ \.php$ {
                #NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini
                include fastcgi.conf;
                fastcgi_intercept_errors on;
                fastcgi_pass php;
        }

        location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
                expires max;
                log_not_found off;
        }
}

I have created the symbolic link from sites-available to sites-enabled and I can see the link using ls.

/var/www/html/myproj contains my wordpress installation.

I have created a symlink from the share folder so that it now appears as:

/var/www/html/myproj

Everything else in the guest is ubuntu + php 7.2 + nginx + mysql

When I browse the project I get:

This site can’t be reached
myproj.com.au refused to connect.

On suggestion below the result of nslookup myproj.com.au is

Server 127.0.0.53
Server Address 127.0.0.53#53

Non-authoritative answer:
Name: myproj.com.au
Address: 52.64....  // An IP I do not recognise

I can ping the guest from a DOS window in the Host and I get a response., so the environment is set up correctly.

ping myproj.com.au

What have I missed? Thanks.