Enhancements for Robustness

[fjlopez]

Describe the bug Several areas need improvement:

• The docker-compose.yml file does not use proper users and passwords, the PostgreSQL image is set to latest, and the volume for data is not defined.
• The Docker files do not use slim or Alpine versions.
• Not all the task data is loaded.
• The default user for the Administration application is not admin:admin.
• The README.md file does not contain an uninstall section.

To Reproduce

• Clone the repository and navigate to the project directory.
• Open the docker-compose.yml file and observe the lack of proper users and passwords, the implicit use of the latest PostgreSQL image, and the absence of a defined volume for data.
• Open the Docker files and observe the absence of slim or Alpine versions.
• Run the application and observe that not all task data is loaded and the default user for the Administration application is not admin:admin.
• Open the README.md file and observe the absence of an uninstall section.

Expected behavior

• Better naming in docker-compose.yml.
• Volume persistence.
• Fixed versions in images.
• Updated data.
• An uninstall section in the README.md file.

[fjlopez]

The loadData statements in the changelog must use lowercase file paths. This is particularly important because while Windows and macOS filesystems are often case-insensitive, Linux filesystems are case-sensitive. Using inconsistent case can lead to failures when the code is deployed in a Linux environment.