Docker From Scratch – Day 4: Docker Networking Explained with Real-World Examples
🐳 Docker From Scratch – Day 4: Understanding Docker Networking In the previous article, we learned how Docker Images are built using Dockerfiles and how containers are created from those images. At this stage, you can successfully build your own Docker Image and launch a container using commands such as docker build and docker run . However, another important question naturally arises. Once a container starts running, how does it communicate with the outside world? How does your browser access a web application running inside a container? How do multiple containers communicate with each other when building real-world applications? The answer lies in Docker Networking. Networking is one of the most fundamental concepts in Docker because almost every application requires communication. Whether it is a frontend connecting to a backend API, an application connecting to a database, or a microservice communicating with another service, networking is what makes these interactions poss...