Note that the Procfile's start command can be a maximum of 255 characters long . I expect all your mongodb configurations are way beyond that.
I didn't checked the heroku api, but it could be a clue.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.