Changed link tag to image to show image on the hello world page.
Created nonce struct that holds a key and could generate a nonce
from a remoteAddr string.

The nonce will consist of 128 bits.
32 bit - RemoteAddr in ipv4 format
32 bit - timestamp
32 bit - Global counter increasing for each generation
32 bit - random bits seeded with current timestamp

The nonce is AES encrypted and base64url encoded.