Update Dockerfile

Dockerfile

@@ -20,7 +20,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 COPY requirements.txt .
 
 # Install Python dependencies
-RUN pip install --no-cache-dir -r requirements.txt gunicorn==21.2.0
+RUN pip install --no-cache-dir -r requirements.txt 
 
 # Create a non-root user and switch to it
 RUN groupadd -r appuser && useradd -r -g appuser appuser