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Note: The whole solution is on my Github. I implemented this service using Spring boot and MySQL.
Now Swagger UI is configured and we can start documenting our API. Inside UrlController, above every endpoint, we can use @ApiOperation annotation to add description. Depending on your needs you can use some other annotations.
First, visit Spring initializr and select Spring Web and MySql Driver. After that click on Generate button and download zip file. Unzip the file and open the project in your favorite IDE. Every time I start a new project, I like to create some folders to logically divide my code. My folders in this case are controller, entity, service, repository, dto, and config.
Now when we have Dockerfile we should build the image from it. But like I mentioned before, we first need to create .jar file from our project so the COPY command in Dockerfile can work properly. To create executable .jar we are going to use maven. We need to make sure we have Maven inside our pom.xml. If Maven is missing, we can add it
FROM - This is where we set a base image for the build base. We are going to use OpenJDK v13 which is a free and open-source version of Java. You can find other images for your base image at Docker hub which is a place for sharing docker images.
Compose is a tool for defining and running multi-container Docker applications. With Compose, you use a YAML file to configure your application’s services. Then, with a single command, you create and start all the services from your configuration.