🚚(backend) rename Impress to Meet

I have updated all references of "Impress" to "Meet".
Migrations were manually updated and not regenerated. Never-mind,
they all will be squashed before the first release.

I have also searched for reference to "Magnify", and replaced them
by "Meet".

While updating the backend sources, I have also fixed other parts of
the project, namely:
- Compose file
- Github documentation and CI
- Makefile commands

env.d/development/common.dist

@@ -1,25 +1,25 @@
 # Django
 DJANGO_ALLOWED_HOSTS=*
 DJANGO_SECRET_KEY=ThisIsAnExampleKeyForDevPurposeOnly
-DJANGO_SETTINGS_MODULE=impress.settings
+DJANGO_SETTINGS_MODULE=meet.settings
 DJANGO_SUPERUSER_PASSWORD=admin
 
 # Python
 PYTHONPATH=/app
 
-# impress settings
+# Meet settings
 
 # Mail
 DJANGO_EMAIL_HOST="mailcatcher"
 DJANGO_EMAIL_PORT=1025
 
 # Backend url
-IMPRESS_BASE_URL="http://localhost:8072"
+MEET_BASE_URL="http://localhost:8072"
 
 # Media
 STORAGES_STATICFILES_BACKEND=django.contrib.staticfiles.storage.StaticFilesStorage
 AWS_S3_ENDPOINT_URL=http://minio:9000
-AWS_S3_ACCESS_KEY_ID=impress
+AWS_S3_ACCESS_KEY_ID=meet
 AWS_S3_SECRET_ACCESS_KEY=password
 
 # OIDC

env.d/development/postgresql.dist

@@ -1,11 +1,11 @@
 # Postgresql db container configuration
-POSTGRES_DB=impress
+POSTGRES_DB=meet
 POSTGRES_USER=dinum
 POSTGRES_PASSWORD=pass
 
 # App database configuration
 DB_HOST=postgresql
-DB_NAME=impress
+DB_NAME=meet
 DB_USER=dinum
 DB_PASSWORD=pass
 DB_PORT=5432