🎉 feat(beta) 🎉 got ready, i.e. TWEAKS

Beta time has come ! 🎉

WARNING: migrations have been reset one last time!

This MR concerns tones of little tweaks:

Reviewed:
* model moderation levels
* serializers.meta.fields value
* Viewset permissions
* on_delete values

Changed:
* Update dark theme color
* Added load prod base script
* beta logo on website
* Added missing about project markdown
* Added RGPD notice to all forms
* Put media files in a docker volume
* More frequent currency exhange rates update

Fixed:
* Front handling of scholarships
* Currencies conversion in the front
* Front theme icons color
* No default networks in prod docker compose to prevent nasty VM routing

Closes #135 #119 #96
9 jobs for master in 3 minutes and 54 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Check
passed #593973
docker
check_back

00:00:18

passed #593974
docker
check_front

00:01:14

 
  Test
passed #593975
docker
test_back

00:01:00

81.0%
passed #593976
docker
test_frontend

00:00:18

 
  Lint
passed #593978
docker
eslint

00:00:24

passed #593977
docker
flake8

00:00:12

 
  Svg Gen Docu
passed #593979
docker
generate_UML_svg

00:00:13

 
  Documentation
passed #593980
docker
pages

00:00:11

 
  Deploy
passed pages:deploy

00:00:00