🔧 [Refactor] Reinvestigate .envs needed for building

Created by: ulfgebhardt

⚡ Refactor ticket

Reinvestigate .envs needed for building -> especially in ci.yml there is two .env copied - do we really need them? Can't we run all programs just with default values?

Motive

Simplification of running our applications

Related issues

Followup: https://github.com/Ocelot-Social-Community/Ocelot-Social/pull/4186

Implementation

Refers to this in ci.yml

      # TODO: Why do we need those .envs?
      - name: backend | copy env files webapp
        run: cp webapp/.env.template webapp/.env
      - name: backend | copy env files backend