Persist secret key in data folder (#620)

* Persist secret key in data folder

* use random secret key by default in prod

* fix e2e test

bootstrap.sh

@@ -8,12 +8,12 @@ mkdir -p data
 # Create favicon folder if it does not exist
 mkdir -p data/favicons
 
+# Generate secret key file if it does not exist
+python manage.py generate_secret_key
 # Run database migration
 python manage.py migrate
 # Enable WAL journal mode for SQLite databases
 python manage.py enable_wal
-# Generate secret key file if it does not exist
-python manage.py generate_secret_key
 # Create initial superuser if defined in options / environment variables
 python manage.py create_initial_superuser