feat(insta-lab): project scaffold (Dockerfile, requirements, config)

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

insta-lab/Dockerfile

@@ -0,0 +1,17 @@
+FROM python:3.12-slim
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    fonts-noto-cjk fonts-noto-cjk-extra \
+ && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+RUN playwright install --with-deps chromium
+
+COPY . .
+
+EXPOSE 8000
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]