what is the IP address of my heroku application
To my knowledge you can not get an ip for a heroku application. You could create a proxy with a known ip that serves as a middleman for the application. Otherwise you might want to look at whether heroku is still the correct solution for you
So in my django application, i'm running a task that will request from an api some data in the form of json. 
in order for me to get this data, i need to give the IP address of where the requests are going to come from (my heroku app)
how do i get the ip address in which my heroku application will request at