Point your domain name to your server

Open Google domain page for your domain. If you have multiple domains this page will list all the domains you have and clicking on the link for the domain will take you to the domain overview page. On the left side choose the DNS link. Clicking this page will open up the DNS page where you have the option to setup options for your name server. 
We went with the default Google domain name servers. 
It is recommended to enable DNSSEC (Domain Name System Security Extensions) for the domain. To learn more about this you can visit this page
Scroll down further to Custom resource records.  You have to make the following entries here :
  1. An A record (also known as root domain)
  2. A CNAME record
To create the A record the following need to be done. 
  1. Add A record: Put the "@" sign in the first box and from the drop-down choose the character A. Note that A should be selected by default. In the next box keep the default 1H and the final box type the permanent IP address for your virtual machine. Click on Add
  2. A CNAME record: Next, add another record where in the first box you put "www". Choose CNAME in the second dropdown and keep the default 1H in the third box. In the last box put the domain name (in this case astu.pw).