feat(docker): add GUNICORN_LOGLEVEL env var (#24308)

docker/run-server.sh

@@ -26,6 +26,7 @@ gunicorn \
     --workers ${SERVER_WORKER_AMOUNT:-1} \
     --worker-class ${SERVER_WORKER_CLASS:-gthread} \
     --threads ${SERVER_THREADS_AMOUNT:-20} \
+    --log-level "${GUNICORN_LOGLEVEL:info}" \
     --timeout ${GUNICORN_TIMEOUT:-60} \
     --keep-alive ${GUNICORN_KEEPALIVE:-2} \
     --max-requests ${WORKER_MAX_REQUESTS:-0} \