Updated FastAPI code

Dockerfile

@@ -10,28 +10,31 @@ RUN apt-get update && apt-get install -y \
 # Set working directory
 WORKDIR /app
 
-# Create a non-root user and group
-RUN addgroup --system app && adduser --system --group app
+# Create a non-root user with a dedicated home directory
+RUN addgroup --system app && adduser --system --group --home /home/app app
 
-# Create writable directories for model and matplotlib cache
-# And change their ownership to the new user
+# Create cache directories and set ownership
 RUN mkdir -p /tmp/huggingface /tmp/matplotlib
 RUN chown -R app:app /tmp/huggingface /tmp/matplotlib
 
-# Copy source code and change its ownership
+# Copy source code and set ownership
+# Do this before switching user
 COPY . .
 RUN chown -R app:app /app
 
 # Switch to the non-root user
 USER app
 
-# Set environment variables to use writable paths
+# Set environment variables
+# Add the user's local bin to the PATH
+ENV PATH=/home/app/.local/bin:$PATH
 ENV HF_HOME=/tmp/huggingface
 ENV HF_HUB_CACHE=/tmp/huggingface
 ENV TRANSFORMERS_CACHE=/tmp/huggingface
 ENV MPLCONFIGDIR=/tmp/matplotlib
 
-# Upgrade pip and install dependencies
+# Now, run pip install as the 'app' user.
+# Pip will correctly install packages to /home/app/.local
 RUN pip install --upgrade pip
 RUN pip install --no-cache-dir torch torchvision torchaudio
 RUN pip install --no-cache-dir git+https://github.com/pyannote/pyannote-audio.git