Update Dockerfile

Dockerfile

@@ -1,15 +1,28 @@
 FROM python:3.9-slim
 
+# Create non-root user for security
+RUN useradd -m appuser && mkdir -p /app && chown -R appuser:appuser /app
+
 WORKDIR /app
 
+# Install dependencies
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
+# Create .streamlit directory and config file
+RUN mkdir -p /app/.streamlit && chown appuser:appuser /app/.streamlit
+COPY .streamlit/config.toml /app/.streamlit/
+RUN chown appuser:appuser /app/.streamlit/config.toml
+
+# Copy application files
 COPY . .
 
-# Set default port, override with environment variable if needed
+# Switch to non-root user
+USER appuser
+
+# Set default port
 ENV PORT=8501
 
 EXPOSE 8501
 
-CMD streamlit run app.py --server.port ${PORT}
+CMD streamlit run app.py --server.port ${PORT} --server.fileWatcherType=none