How to run a Phoenix application with Docker

In a detailed tutorial, the process of deploying a Phoenix application using Docker is explored, emphasizing the importance of Elixir's runtime dependencies like Erlang. The tutorial dissects a Dockerfile from the Phoenix release documentation, explaining each step, from building to runtime, and highlights the inclusion of Node.js and npm, which are not part of the official Dockerfile. The build phase involves setting up dependencies, compiling assets, and preparing the application for release, while the runtime phase focuses on creating a lean final Docker image that contains only the compiled release and essential runtime necessities. The tutorial underscores the advantage of using separate builder and runtime images, which optimize the size and speed of the runtime image, and encourages developers to customize the Dockerfile to suit their project's needs. The article also promotes LogRocket as a tool for improving digital experiences and provides instructions for its setup.