Update Dockerfile

Dockerfile

@@ -1,7 +1,10 @@
 # Use Python 3.9
 FROM python:3.9
 
-# Set up user to avoid permission errors
+# 1. Install System Dependencies (FFmpeg is required for MP3 audio)
+RUN apt-get update && apt-get install -y ffmpeg
+
+# Set up user permissions
 RUN useradd -m -u 1000 user
 USER user
 ENV HOME=/home/user \
@@ -12,7 +15,7 @@ WORKDIR $HOME/app
 # Copy files
 COPY --chown=user . $HOME/app
 
-# Install dependencies
+# Install Python libraries
 RUN pip install --no-cache-dir --upgrade -r requirements.txt
 
 # Create cache directory