Add testing for Docker image

[fityannugroho]

Description

We need to enhance our CI/CD pipeline to include testing for our Docker image in the following scenarios:

1. When there is a pull request (PR) to the main branch (pr-tests.yml)
2. When pushing directly to the main branch (tests.yml)

Tasks:

1. Setup CI/CD Pipeline for PRs to Main

   • Create a new GitHub Actions workflow file to test the Docker image when there is a pull request to the main branch.
   • Ensure that the workflow includes steps to build and test the Docker image.

2. Setup CI/CD Pipeline for Pushes to Main

   • Create a new GitHub Actions workflow file to test the Docker image when pushing to the main branch.
   • Ensure that the workflow includes steps to build and test the Docker image.

Benefits:

• Ensure the integrity and functionality of the Docker image before merging changes to the main branch.
• Catch and fix any issues with the Docker image in the early stages of the development process.