* New enviroment variables BTCPAY_HTTP_PORT and BTCPAY_HTTPS_PORT
* Added new vars to btcpay-setup.sh + added docs
* Renamed BTCPAY_HTTP_PORT to REVERSEPROXY_HTTP_PORT and BTCPAY_HTTPS_PORT to REVERSEPROXY_HTTPS_PORT
* Update btcpay-setup.sh
Added ` ` around REVERSEPROXY_HTTP_PORT
* Added REVERSEPROXY_HTTP_PORT ans REVERSEPROXY_HTTPS_PORT to helpers.sh