chore: project scaffolding — Docker, nginx, dependencies

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

backend/Dockerfile

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+FROM nvidia/cuda:12.4.1-runtime-ubuntu22.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+ENV PYTHONUNBUFFERED=1
+
+# System dependencies
+RUN apt-get update && apt-get install -y \
+    python3.11 python3.11-venv python3-pip \
+    ffmpeg \
+    libpango-1.0-0 libpangocairo-1.0-0 libgdk-pixbuf2.0-0 \
+    libffi-dev libcairo2 \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN ln -sf /usr/bin/python3.11 /usr/bin/python
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN python -m pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]

backend/requirements.txt

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+# Web framework
+fastapi==0.115.6
+uvicorn[standard]==0.34.0
+python-multipart==0.0.20
+
+# Database
+sqlalchemy[asyncio]==2.0.36
+asyncpg==0.30.0
+alembic==1.14.1
+
+# Validation
+pydantic==2.10.4
+pydantic-settings==2.7.1
+
+# Auth
+passlib[bcrypt]==1.7.4
+python-jose[cryptography]==3.3.0
+
+# Task queue
+celery[redis]==5.4.0
+redis==5.2.1
+
+# AI/ML
+faster-whisper==1.1.0
+litellm==1.55.8
+
+# Messengers
+aiogram==3.15.0
+
+# Export
+python-docx==1.1.2
+weasyprint==63.1
+jinja2==3.1.5
+markdown==3.7
+
+# Utils
+ffmpeg-python==0.2.0
+httpx==0.28.1
+
+# Testing
+pytest==8.3.4
+pytest-asyncio==0.25.0
+httpx==0.28.1