docs: update readme

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 This is a DNS server that responds to queries with TXT records containing random phrases.
 
 
 This is a DNS server that responds to queries with TXT records containing random phrases.
 

+I mainly implemented this to become familiar with Elixir.
+

 ## Usage
 
 ## Usage
 

+You can use any tool to make DNS queries. A popular one in Unix systems is `dig`:
+

 ```bash
 dig @dns.frustrated-functor.dev
 ```
 
 ```bash
 dig @dns.frustrated-functor.dev
 ```
 

+You should see a TXT record in the ANSWERS section displayed by `dig`.
+

 ## License
 MIT
 ## License
 MIT