Fix: Add missing system dependencies (libsndfile1, ffmpeg) for audio processing

Dockerfile

@@ -16,6 +16,16 @@ WORKDIR $HOME/app
 # Copy the current directory contents into the container at $HOME/app setting the owner to the user
 COPY --chown=user . $HOME/app
 
+# Install system dependencies for audio processing (librosa, etc.)
+USER root
+RUN apt-get update && apt-get install -y \
+    libsndfile1 \
+    ffmpeg \
+    && rm -rf /var/lib/apt/lists/*
+
+# Switch back to the "user" user
+USER user
+
 # Install requirements
 RUN pip install --no-cache-dir --upgrade -r requirements.txt