Deploy a Flask Application with Dokku

Dokku is a self-hosted Platform-as-a-Service (PaaS) that makes deploying applications simple using Git. Although Dokku’s implementation is similar to Heroku, it lacks certain key features such as auto-scaling. Dokku is an extremely powerful tool that automatically runs your application inside Docker and requires minimal configuration of web servers.

This guide demonstrates how to:

Create a Flask application that returns ‘Hello World!’ on the index page

Install Dokku on a Linode

Deploy a Flask application with a WSGI server inside a Docker container

Add an SSL certificate through Dokku with the Let’s Encrypt plugin