Make backend debuggable

[claasga]

Description

We cannot properly debug the backend as docker makes things more difficult. Additionally, Codechanges have long feedback loops as containers oftentimes have to be rebuild

AC

• Feedbackloops are shorter then 1 Minute
• IDE debugging is viable
• Solution can be applied on Linux and Windows
• Solution can be applied to VSCode and Jetbrains IDE

[Toni000]

The main problem here is celery rebuilding, no? Or is there something else that needs fixing?