As a developer keeping Pizzeria on production
I would like to avoid that other people use that api 
To decrease my servers costs. 

As We know, is easier generate a chart with pizzeria, for example when you want to put a chart image
in a newsletter template, you could to use
http://yourdomaintopizzeria.com/pie?h=200&w=300&dt=70,30&lb=etpay,corporate

but this expose the url base to the api and anyone could consume it to generate another charts.
Currently the only way to avoid it is always consume pizzeria from another api or use nginx, for example, to create alias and hide the real path.
It would be nice that Pizzeria works with a parameter checksum that is a encrypted data of all the parameters.
See below how we can do it :

• Add parameter on config.json to decide if api will use checksum
• Add parameter on config.json to set the secret phrase
• Check in every endpoint if pizzeria needs to encrypt parameters in some algorithm (using the secret phrase) and if this value is equal then a checksum parameter send on request.

As a user who receive many requests per second
I would like to have a cache support using some drivers
To avoid generate the same image many times

A first implementation of this was started but it is not stable yet.

As a developer trying to use Pizzeria as the fist time
We need a easier way to install the tool 

It can be done with:

• Makefile
• bash script command like curl file | bash

This would let people use it easily who aren't go developers.