DNS

The Domain Name System (DNS) is a naming system for computers or other resources
connected to a network.
It associates various information with domain names.

Server

A server can be setup via docker with the ventz image

Records

A record

A (address) records map hostnames to an IP.
Its basic structure is:

name.        A      IP

Where name is the domain to map the IP to and A is the constant for
the type of the record.

CNAME record

CNAME (canonical name) records map one domain name to another.
Its basic structure is:

name.        CNAME  value.

Where name is the domain to map the value (another domain) to and CNAME is
the constant for the type of the record.

SRV record

Service (SRV) records define the port and hostname for specified services.
Its basic structure is:

_service._proto.name. TTL class SRV priority weight port target

Where _service is the service name, _proto is the used protocoll (TCP/UDP),
name is the domain name to assign to, TTL is the DNS time to live, class
always is IN, SRV is the constant for the type of the record, priority is
the priority of the target host, weight is the relative weight for records
with the same priority, port is the port on that the service can be found and
target is the canonical hostname of the server.

Note that you need to create an A if you bind a service to a name that doesn't
already have one.