Initial commit: PastPaper Master full stack

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/Dockerfile

@@ -0,0 +1,16 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+
+# System deps for PyMuPDF
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libmupdf-dev gcc g++ && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY pyproject.toml .
+RUN pip install --no-cache-dir .
+
+COPY app/ app/
+
+EXPOSE 8000
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]