The title says it almost all, but let me give you some context. While I had no experience in web programming, I had a web app idea which I wanted t...
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Dávid explained the Heroku part, I'll focus on the Django part
You should definitely not run Django in debug mode if it's a production website, you're leaking info in case of errors and having a slower website.
My suggestion is to go through the Django production checklist and run
manage.py check --deploywhich catches most of them.Regarding the "takes a few seconds to reach the website", it happens because the free tier sleeps after 30mins of inactivity. You get 550 free dyno hours when you verify your credit card you get another 450 hours, a total of 1000 hours. If you don't mind using up all your hours, then you can ping your website every 20mins or something like that. So it never sleeps.