feat: Dockerfiles for pipeline, api, and cron containers

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pipeline/Dockerfile

@@ -0,0 +1,20 @@
+FROM python:3.12-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ffmpeg libsndfile1 && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY pyproject.toml .
+RUN pip install --no-cache-dir torch --index-url https://download.pytorch.org/whl/cpu && \
+    pip install --no-cache-dir resemblyzer silero-vad scipy numpy && \
+    pip install --no-cache-dir fastapi uvicorn[standard] pydantic-settings httpx websockets livekit-api
+
+COPY app/ app/
+
+# Pre-download VAD and resemblyzer models into the image
+RUN python -c "import torch; torch.hub.load('snakers4/silero-vad', 'silero_vad', trust_repo=True)" && \
+    python -c "from resemblyzer import VoiceEncoder; VoiceEncoder()"
+
+ENV PYTHONUNBUFFERED=1
+CMD ["python", "-m", "uvicorn", "app.pipeline.main:app", "--host", "0.0.0.0", "--port", "8300"]