To design a solution using containers, you will need to design a solution based on the microservices concept. This new architectural style is an approach to developing a single application as a suite of small services, each running in its own process and communicating with lightweight mechanisms, often an HTTP resource API. This provides an easy mechanism that can even replace technologies, for example, moving from PostgreSQL to MS SQL as you will not have to modify the microservices; just by replacing one microservice, the others will run properly.

The following images describes the concept of container services:

Now, let's combine microservices and containers. The result is a flexible and scalable environment that gives the possibility to spin up additional containers to provide better performance and latency in the app, without any specific configuration changes.