Presented approach uses fact, if we have set many domains under one apache2 instance, we can send Host: my-domain.com header that switches between domains under same server.

Note: check if curl is installed - you can use Windows or Linux Bash.

Run following command:

curl '88.77.44.200' -H 'Host: my-domain.com' --compressed --insecure

Where:

88.77.44.200 should be replaced with your server ip address of machine with apache2,
my-domain.com should be replaced with domain configured in VirtualHost.

Example output:

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=0.8, user-scalable=yes">
<title>Welcome on my page!</title>

...

Apache2 configuration

Example /etc/apache2/sites-enabled/my-domain.com.conf file content:

<VirtualHost *:80>
        ServerName my-domain.com
        ProxyPreserveHost On
        ProxyPass / http://127.0.0.1:8080/
        ProxyPassReverse / http://127.0.0.1:8080/
</VirtualHost>