change sql request for getPrivateMessageUser and add default profile picture for users

docker-compose/requirements/djangoserver/start.sh

@@ -2,6 +2,5 @@ until pg_isready -h "$DB_HOST"; do sleep 0.5 ;echo "waiting for database";done
 cd /var/www/djangoserver/server
 python3.12 manage.py makemigrations server
 python3.12 manage.py migrate
-python3.12 manage.py collectstatic
 #python3 manage.py runserver 0.0.0.0:8000
 daphne -p 8000 -b 0.0.0.0 server.asgi:application