Build Docker Image of Spring Boot Web App with JDK8, Tomcat, JSP, JSTL and Access Host PostgreSQL

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In this comprehensive tutorial, I walk you through the process of building a Docker image for a Spring Boot web application. The application is developed using JDK 8 and runs on a Tomcat server, utilizing JSP (Java Server Pages) and the JSTL (Java Server Pages Standard Tag Library) for rendering views.

Throughout the video, I cover the essential steps involved in creating a Docker image. First, I guide you on how to write a Dockerfile, which includes all the necessary instructions to containerize the WAR file. We explore the various components, such as the JDK, Tomcat server, JSP files, and the JSTL tag library, required to ensure the successful deployment of our application within a Docker container.

Additionally, I demonstrate the usage of the Maven Fabric8 Docker plugin, a powerful tool that simplifies the process of building Docker images. With this plugin, we streamline the packaging and deployment of our application.

During the video, I provide a live demo using Docker Desktop, showcasing the running application within a Docker container. I highlight the benefits of containerization, including portability, scalability, and ease of deployment, all of which are crucial for modern software development practices.

Furthermore, I address a common challenge when accessing a host PostgreSQL database from within a Docker container. I guide you through the troubleshooting process, providing practical solutions to overcome this issue and ensure smooth communication between the containerized application and the host PostgreSQL database.

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