Rename Dockerfile to dockerfile

Dockerfile → dockerfile

@@ -17,6 +17,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libsndfile1 \
     ffmpeg \
     curl \
+    ca-certificates \
     && rm -rf /var/lib/apt/lists/*
 
 # Set the working directory
@@ -26,25 +27,25 @@ WORKDIR /app
 # Create a new user 'appuser' with UID 1000 and create their home directory
 RUN useradd --create-home --uid 1000 appuser
 
-# Switch to the non-root user
-USER appuser
-
-# ---- Add this line to fix the PATH issue ----
-ENV PATH="/home/appuser/.local/bin:${PATH}"
-
-# Create the cache directory and set ownership to the new user
-# This needs to run as root, so we'll adjust the Dockerfile structure slightly
+# Switch to root to create dirs and set permissions
 USER root
 RUN mkdir -p /app/cache && chown -R appuser:appuser /app /app/cache
 USER appuser
-# ---- END: Non-Root User Configuration ----
 
-# Copy requirements file and install dependencies as the non-root user
+# Ensure pip is up-to-date for wheel installs
+RUN python -m pip install --upgrade pip
+
+# Install CPU-only PyTorch and torchaudio from official index (explicit CPU builds)
+# Pin versions appropriately - adjust versions if needed.
+# Using the official torch wheel index ensures CPU-only wheels are used, avoiding GPU ABI mismatches.
+RUN pip install --no-cache-dir "torch==2.2.0+cpu" "torchaudio==2.2.0+cpu" -f https://download.pytorch.org/whl/torch_stable.html
+
+# Copy requirements and install remaining dependencies as non-root user
 COPY --chown=appuser:appuser requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Clone the NeuTTS Air repository
-RUN git clone https://github.com/neuphonic/neutts-air.git
+# Clone the NeuTTS Air repository (shallow to save space)
+RUN git clone --depth 1 https://github.com/neuphonic/neutts-air.git
 
 # Copy the application code
 COPY --chown=appuser:appuser app.py .