Update Dockerfile

Dockerfile

@@ -1,41 +1,35 @@
-# -------------------------------
-# Lightweight Dockerfile for MCA Comment Analyzer Demo
-# -------------------------------
-
-# Use official Python slim image (lightweight)
+# ---- Base image
 FROM python:3.11-slim
 
-# Set working directory
+# ---- Set working directory
 WORKDIR /app
 
-# Prevent Python from writing pyc files
-ENV PYTHONDONTWRITEBYTECODE=1
+# ---- Avoid warnings and set env for matplotlib
 ENV PYTHONUNBUFFERED=1
-
-# Set Streamlit config to avoid cache warnings
 ENV MPLCONFIGDIR=/tmp/.matplotlib
-ENV STREAMLIT_BROWSER_GATHERUSAGESTATS=false
+ENV DEBIAN_FRONTEND=noninteractive
 
-# Install system dependencies for Python packages
-RUN apt-get update && apt-get install -y --no-install-recommends \
+# ---- System dependencies
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
     build-essential \
-    git \
     wget \
+    git \
     curl \
-    unzip \
-    && rm -rf /var/lib/apt/lists/*
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
-# Copy requirements first (for Docker caching)
+# ---- Copy requirements
 COPY requirements.txt .
 
-# Install Python dependencies (CPU-only)
+# ---- Install Python dependencies
+RUN pip install --no-cache-dir --upgrade pip
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Copy app code
+# ---- Copy app files
 COPY . .
 
-# Expose Streamlit default port
+# ---- Expose Streamlit default port
 EXPOSE 8501
 
-# Command to run Streamlit app
+# ---- Command to run Streamlit app
 CMD ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0", "--server.enableCORS=false"]