Once you finish your application, you pack it into the container; hence, your application is containerized. Eventually, we will move this container into some cloud service provider like AWS, Azure, etc. As a developer, you are more concerned about source code and its environment and not the host machine/cloud configuration…

What if many developers use different OS and versions on their local machines? What if dependencies and libraries used by one developer and others are different? What if the development team and testing team environment are different? You can still ask different permutations and combinations of the above questions, but…

We use docker based on commands like docker build, docker run,-v,-p, etc., every time we develop images or containers. Even though commands are long and repeated many times, we still type in command prompt/shell. When it comes to technology, it’s all about convenience and reducing repetition. So docker comes with…

We choose dockers because of isolation and separation. But no application is complete without communication. By communication, I mean APIs. Communication can be outside(web), localhost, or between containers. Say we built an application with a database like MySQL, Django as backend, and React as frontend. When we containerize the app…

We have code and its environment(e.g. node dependencies) in our local machine. We create a docker file and instruct them to create an image. Images are read-only and take the snapshot of code at that particular time it was created. Therefore we need containers to run them. …

A Docker file is the text file that builds Docker images. This text file contains particular instructions about the container. To build a Docker file, follow the steps below. For example, FROM node → from official node image in docker hub(this will be the base image) WORKDIR ./app → this…

Please read Docker pre-requisites here Why Containers? When we develop an app, we choose a language like JS, Python, Java, etc. These languages need to be executed and hence we need a runtime environment like node JS. This Node JS comes in different versions. When we are developing, we might have used…

Usually, any web applications consist of a Frontend, Backend, and Database. As a developer, we may use different languages or frameworks like React, Node js, Angular, Django, etc. to develop an app. At the end of the day, we need hardware like Memory, Processors(CPU), and Storage to run our application…

We know that State is like a variable of data type numbers to array/objects. If the variable is dynamic(changes), we use State. Since the state is a variable, how it is scoped is to whom does it have access? React components are functions that returns react elements, and we declare…