Update Dockerfile

Dockerfile

@@ -5,6 +5,9 @@ RUN apt-get update && apt-get install -y \
     fluidsynth \
     libsndfile1 \
     wget \
+    libfreetype6-dev \
+    libpng-dev \
+    pkg-config \
     && rm -rf /var/lib/apt/lists/*
 
 # Create app directory
@@ -27,8 +30,10 @@ RUN mkdir -p /app/soundfonts && \
     wget -O /app/soundfonts/Clarinet.sf2 https://musical-artifacts.com/artifacts/2744/SalC5Light.sf2 && \
     wget -O /app/soundfonts/Flute.sf2 https://musical-artifacts.com/artifacts/2744/SalC5Light.sf2
 
-# Create static directory for audio files
+# Create necessary directories
 RUN mkdir -p /app/static
+RUN mkdir -p /app/exercise_library
+RUN mkdir -p /app/temp_audio
 
 # Set environment variables
 ENV PYTHONUNBUFFERED=1