Fix cache directory permissions in Dockerfile

Dockerfile

@@ -15,8 +15,8 @@ COPY . /app
 # Install the required Python packages
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Create the cache directory
-RUN mkdir -p /tmp/hf_cache
+# Create the cache directory and set permissions
+RUN mkdir -p /tmp/hf_cache && chmod -R 777 /tmp/hf_cache
 
 # Expose the port that FastAPI will run on
 EXPOSE 7860