address hf spaces permission issues

https://huggingface.co/docs/hub/spaces-sdks-docker#permissions

Dockerfile

@@ -16,6 +16,12 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
+    # Set up a new user named "user" with user ID 1000
+RUN useradd -m -u 1000 user
+
+# Switch to the "user" user
+USER user
+
 # Set up working directory
 WORKDIR /app