ReverseApp is an application made in Java 11 and Spring Boot that is exposed on port 8080 and that I have put inside a Docker container.
It is a web application that when making GET requests to "/" returns a JSON with a message that describes how to use it, request example using curl:
curl -s http://localhost:8080/ | jq '.'And when making a GET request to "/reverse", and passing a text string in the "text" parameter, it returns a JSON with the same string in reverse , example request using curl:
curl -s http://localhost:8080/reverse?text=Hello%20World | jq '.'To build the docker image, assuming we are located in the same directory where the Dockerfile is:
docker build -t <image_name>:<tag> .To run a container and test it:
docker run --rm -d --name -p 8080:8080 <container-name> <image_name>:<tag>To make things easier, there is a Makefile with all these tasks defined with which you can create a container image, test it and publish it to Docker Hub if necessary.
For more details about container creation check out the Dockerfile.
For more details about creating, running, and publishing the container image, see the Makefile.