Deploy Docker images on Fly.io free tier

Three different ways to deploy Docker images.

In this article: Heroku drops the free tier, why Fly.io is a better platform, and the different ways to deploy your Dockerized applications on Fly.io.

Heroku announced in August the end of the free tier of the application hosting and data services, to be focusing only on (paying) mission-critical applications. Student, no-profit and open-source programs should still be available (maybe newly re-designed) but the era of free hosting for your prototypes and new…