Implement support to Devcontainer

[vitormattos]

References:

• Documentation project as example:
  https://github.com/nextcloud/documentation/tree/main/.devcontainer
• Devcontainer of LibreSign using docker-compose.yml
  https://github.com/LibreSign/libresign/tree/main/.devcontainer

Look the current Dockerfile of this project at .docker folder and look the docker-compose.yml file

This is a good first issue for someone who wants to make their first contribution. Feel free to ask questions in the comments if you need help!