63 - Spring Boot & Docker : Create Docker File | Create a Docker Image | Run inside Docker Container

#HowTo #Docker #WhatisDocker #SpringBootDocker #DockerImage #DockerFile #SpringBoot #DockerContainer

Dockerfile
========
FROM openjdk:8-jdk-alpine

Docker is a container management service. The keywords of Docker are develop, ship and run anywhere. The whole idea of Docker is for developers to easily develop applications, ship them into containers which can then be deployed anywhere.

Docker is a set of platform as a service (PaaS) products that use OS-level virtualization to deliver software in packages called containers. Containers are isolated from one another and bundle their own software, libraries and configuration files; they can communicate with each other through well-defined channels. Because all of the containers share the services of a single operating system kernel, they use fewer resources than virtual machines.

The service has both free and premium tiers. The software that hosts the containers is called #DockerEngine. It was first started in 2013 and is developed by Docker, Inc.

Docker makes development efficient and predictable
Docker takes away repetitive, mundane configuration tasks and is used throughout the development lifecycle for fast, easy and portable application development - desktop and cloud. Docker’s comprehensive end to end platform includes UIs, CLIs, APIs and security that are engineered to work together across the entire application delivery lifecycle.

Build
Get a head start on your coding by leveraging Docker images to efficiently develop your own unique applications on Windows and Mac. Create your multi container application using the Docker Compose CLI.
Integrate with your favorite tools throughout your development pipeline - Docker works with all development tools you use including VS Code, CircleCI and GitHub.
Package applications as portable container images to run in any environment consistently from on-premises Kubernetes to AWS ECS, Azure ACI, Google GKS and more.

Share
Leverage with confidence Docker certified and official images from the Docker Hub image repository. Use these trusted and secure images as the foundation for your application development.
Innovate by collaborating with team members and other developers and by easily publishing images to Docker Hub.
Personalize developer access to images with roles based access control and get insights into activity history with Docker Hub Audit Logs.

Run
Deliver multiple applications hassle free and have them run the same way on all your environments including design, testing, staging and production - desktop or cloud-native.
Deploy your applications in separate containers independently and in different languages. Reduce the risk of conflict between languages, libraries or frameworks.
Speed development with the simplicity of Docker Compose CLI and with one command, launch your applications locally and on the cloud with AWS ECS, Acure ACI and Google GKS.

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[shubhamswaraj]

When SAML and OKTA is used for securing application or when Oauth and JWT is used, how to decide which one to use or which is mostly used in industry?