Update Dockerfile to revert to Python 3.8.5 and streamline installation process

Author: pankaj2k9

Dockerfile

@@ -1,23 +1,9 @@
-FROM python:3.9-slim
+FROM python:3.8.5-slim-buster
 
-# Install system dependencies
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    build-essential \
-    software-properties-common \
-    git \
-    && rm -rf /var/lib/apt/lists/*
-
-# Set work directory
 WORKDIR /app
 
-# Copy app files
 COPY . /app
 
-# Install Python requirements
-RUN pip3 install --no-cache-dir -r requirements.txt
-
-# Streamlit port
-EXPOSE 8501
+RUN pip install -r requirements.txt
 
-# Run Streamlit
-ENTRYPOINT ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0"]
+CMD ["python3", "app.py"]