Shipping Methods

Hello everyone!

I have to implements an addon about shipping methods ( Correios Brazil ), and i have some questions about how to implements it into the framework.

Reading hes documentation, i figure out how to implements an addon, but i whant to know where i put the codes of php, html and css and if i can use javascript for the beck-end development, to resolve this issue about shipping methods.

Unfortunately, there is no detailed documentation for integration of shipping services. Try to find free addons on the marketplace and use them as example