Initial commit: Børnetime app scaffold

FastAPI + Celery + Svelte app for English→Danish video translation
with voice cloning. Includes diarization, STT, translation, TTS,
and audio mixing pipeline.

Dockerfile.worker

@@ -0,0 +1,23 @@
+FROM rocm/pytorch:rocm6.3.2_ubuntu24.04_py3.12
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y ffmpeg && rm -rf /var/lib/apt/lists/*
+
+RUN pip install --no-cache-dir \
+    torch transformers accelerate \
+    boson_multimodal \
+    soundfile librosa \
+    pyannote.audio \
+    llama-cpp-python \
+    numpy aiofiles \
+    sqlalchemy aiosqlite \
+    pydantic pydantic-settings \
+    celery[redis] redis
+
+ENV PYTHONPATH=/app
+ENV HUGGINGFACE_HUB_CACHE=/data/hf_cache
+
+COPY backend/ .
+
+CMD ["celery", "-A", "app.tasks.celery_app", "worker", "--loglevel=info", "--concurrency=1"]