make install-backend not working properly

The script ran by the instance **make install-backend** run successfully and does not raise erros, however I noticed that when I tried to run the server with make run-dev the requirements.txt were not all installed, not sure why but re-installing all of them (the main packages) I got this sorted.

Start by inspecting the Makefile entries for install-backend and run-dev, then compare their behavior with requirements.txt. Reproduce the installation in a clean environment and identify which requirements remain unavailable when the development server starts. Done means make install-backend makes the dependencies needed by make run-dev available without manual reinstallation.

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