Example web stacks that are containerised. This repository uses Docker and Compose to build and manage its containers. This repository has the following demos:
| Demo | Description |
|---|---|
| Docker Compose | Test your Docker installation with a basic Docker Compose example. |
| Dockerfile and Docker Compose | Build a container image of a simple app and run the container image. |
| Container Isolation and Docker Compose | Build a basic NodeJS and ExpressJS web application and view the web response in a web browser, demonstrating container isolation. |
| Docker Compose and Multiple Containers (Mongo-Express-Node web stack) | Build a web application (NodeJS and ExpressJS) in a container which communicates with a database (Mongo) in another container. This demonstrates the basic principles involved in containerising web stacks. |
Each demo builds upon the previous one.
Containers are software/code that is packaged into "Standardized Units for Development, Shipment and Deployment". Docker Compose is a tool for defining and running multi-container applications. Containers are important for reliably sharing, testing, and deploying applications, and using Compose enables containers to be easily shared and run together.
For example, a simple web application could be split into a few containers and shared (and tested) on all development team members' computers, if needed:
graph LR;
id1(Front-end)<-->id2(Logic);
id2(Logic)<-->id3(Database);
Compose files are written in YAML, a common language often used to write configuration files.