added some code

.dockerfile

@@ -1,17 +1,36 @@
 # Use the official Python 3.11.5 image
 FROM python:3.11.5
 
-# Set the working directory
+# Expose the application port
+EXPOSE 7860
+
+# Environment settings
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+# Set the working directory inside the container
 WORKDIR /app
 
-# Copy the backend folder into the container
+# Copy the backend code into the container
 COPY backend /app
 
 # Install dependencies
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Expose the port FastAPI runs on
-EXPOSE 7860
+# Create a non-root user
+RUN useradd -m -u 1000 user
+
+# Create a writable directory for attachments and assign ownership to the non-root user
+USER root
+RUN mkdir -p /data/attachments && chown -R user:user /data/attachments
+
+# Ensure correct permissions (optional but recommended)
+RUN chown -R root:root /app
+
+# Switch to the non-root user
+USER user
+ENV HOME=/home/user \
+    PATH=/home/user/.local/bin:$PATH
 
-# Run FastAPI app
-CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]
+# Start the FastAPI application
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]