289 auth login page functionality

[AvilaAndre]

Closes #289

Performs the request to the backend to login, showing a message if it succeeds or not and redirecting to the landing page if it does.

This pull request also includes changes to the docker compose, due to requiring access to the localhost in a development environment to access the backend.

Screenshots

Review checklist

• Contains enough appropriate tests
• Behavior is as expected
• Clean, well-structured code

[AvilaAndre]

There are none of the remaining auth methods, there is a logout in the page /profile which validates the auth with the backend, something like that could be used to manage session on the frontend, however, I do not know which way would be more efficient and therefore I haven't started it in this PR.

[MRita443]

@AvilaAndre Check linter pls ;(

[MRita443]

While you're at it, can you remove version: '3' from docker-compose.yaml? It's deprecated

[MRita443]

Great job! :)