Docker swarm single node deployment of a Node.js, Postgres and Angular 9 web app using Ansible and nginx-proxy with automated SSL certificates

In this blog post I will present a DevOps workflow I use to deploy a microservice based web application on a single node. We will use an example of an Angular 9 app, Node.js REST API backend and a Postgres database. We will orchestrate this system with Docker swarm and deploy it using Ansible. This will allow us to deploy, update and rollback the system with a single command. We will also use nginx-proxy as an entry point to the application and letsencrypt-nginx-proxy-companion to automate SSL certificates.