Build and deploy a Flask app using Docker

The text is a comprehensive guide on creating and containerizing a simple web application using Flask, a lightweight Python web framework, and Docker, an open-source tool for containerizing applications. The tutorial walks through the step-by-step process of setting up a Flask application, writing Python requirement files, and creating a Dockerfile to package the application and its dependencies into a self-sufficient container. It further explains how to build and run the Docker image, and subsequently deploy the containerized application to Docker Hub and Heroku, two platforms that facilitate application hosting and deployment. Additionally, the guide provides insights into using Docker's port-binding approach, setting up a Procfile for Heroku deployment, and emphasizes the benefits of containerization in terms of application compatibility and ease of deployment. Resources for further learning about Docker and Flask, as well as instructions for integrating LogRocket for error tracking, are also included.