Modify dockerfile to have user write permissions

Dockerfile

@@ -1,19 +1,22 @@
 # Use an official Python runtime as a base image
 FROM python:3.9-slim
 
-# Environment variables to prevent Python from writing pyc files and buffering stdout/stderr
+# Prevent Python from writing .pyc files and enable unbuffered logging
 ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
-ENV TRANSFORMERS_CACHE=/app/.cache
-# Set working directory inside the container
-WORKDIR /app
 
-RUN mkdir -p /app/.cache
+# Set HF_HOME to a writable cache directory
+ENV HF_HOME=/app/.cache/huggingface
+
+# Create the cache directory and ensure it is writable
+RUN mkdir -p /app/.cache/huggingface && chmod -R 777 /app/.cache/huggingface
+
+# Set the working directory inside the container
+WORKDIR /app
 
-# Copy and install the backend requirements
+# Copy and install backend dependencies
 COPY backend/requirements.txt /app/backend/requirements.txt
-RUN pip install --upgrade pip
-RUN pip install -r /app/backend/requirements.txt
+RUN pip install --upgrade pip && pip install -r /app/backend/requirements.txt
 
 # Copy the entire project into the container
 COPY . /app
@@ -21,5 +24,5 @@ COPY . /app
 # Expose port 8000 (the port our app will run on)
 EXPOSE 8000
 
-# Command to run the FastAPI app using Uvicorn
+# Run the FastAPI app using Uvicorn
 CMD ["uvicorn", "backend.app:app", "--host", "0.0.0.0", "--port", "8000"]