refactor(backend): removed dynamic imports 🎊

* Removed all dynamic imports to have more standard Django infrastructre and ease future refactoring
* Removed now useless config files
* Returns the list of available endpoints to the frontend directly from the html
* updated documentation accordingly

Fixes #95
9 jobs for master in 5 minutes and 16 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Check
passed #490651
docker
check_back

00:00:21

passed #490652
docker
check_front

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  Test
passed #490653
docker
test_back

00:00:44

89.0%
passed #490654
docker
test_frontend

00:00:44

 
  Lint
passed #490656
docker
eslint

00:00:58

passed #490655
docker
flake8

00:00:12

 
  Svg Gen Docu
passed #490657
docker
generate_UML_svg

00:01:03

 
  Documentation
passed #490658
docker
pages

00:00:12

 
  Deploy
passed pages:deploy

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