Docker Microservices Demo with Cross-Language Containers From Local Development to Docker - A Cross-Language Technical Roadmap By the end of this guide, you'll understand how to: Build a microservices application using multiple programming languages Run C# (.NET), Python (Flask), and Node.js (Express) services independently Convert applications into Docker images Use a Docker network so containers can communicate by service name Understand how containers isolate file systems, networking, and runtime environments Use docker build , docker run , and docker network commands Build a basic frontend that communicates with backend services Prerequisites Foundational Knowledge Basic understanding of C#, Python, and JavaScript/Node.js Familiarity with command line/terminal Basic understanding of APIs and HTTP requests Software Required Docker Desktop installed and running .NET 8 SDK (Optional) Python 3.12+ (Optional) Node.js 22+ (Optional) Google Chrome or any browser Text editor (VS Code recommended) Hardware…