Rename Dockerfile to dockerfile

Dockerfile → dockerfile

@@ -7,6 +7,7 @@ RUN apt-get update && apt-get install -y \
     espeak-ng \
     libsndfile1 \
     git \
+    ffmpeg \
     && rm -rf /var/lib/apt/lists/*
 
 # Copy requirements first for better caching
@@ -16,14 +17,15 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy application code
 COPY . .
 
-# Clone neutts-air and set up properly (no pip install needed)
+# Clone neutts-air
 RUN if [ ! -d "neutts-air" ]; then \
     echo "Cloning neutts-air..."; \
     git clone https://github.com/neuphonic/neutts-air.git; \
     fi
 
-# Verify the structure
-RUN echo "NeutTS Air contents:" && ls -la neutts-air/
+# Set numba cache directory to writable location
+ENV NUMBA_CACHE_DIR=/tmp/numba_cache
+RUN mkdir -p /tmp/numba_cache && chmod 777 /tmp/numba_cache
 
 EXPOSE 7860