Update dockerfile

dockerfile

@@ -1,17 +1,23 @@
 # Use official Python runtime
 FROM python:3.9
 
-# Set the working directory
+# Create and switch to a non-root user
+RUN useradd -m -u 1000 user
+USER user
+ENV PATH="/home/user/.local/bin:$PATH"
+
+# Set working directory inside container
 WORKDIR /app
 
-# Copy application files
-COPY . .
+# Copy requirements file and install dependencies
+COPY --chown=user ./requirements.txt requirements.txt
+RUN pip install --no-cache-dir --upgrade -r requirements.txt
 
-# Install dependencies
-RUN pip install --no-cache-dir -r requirements.txt
+# Copy the entire app code
+COPY --chown=user . /app
 
-# Expose the correct port for FastAPI
+# Expose port 7860 (used by Hugging Face Spaces)
 EXPOSE 7860
 
-# Run the FastAPI app with Uvicorn
+# Run FastAPI app with Uvicorn
 CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]