Add root Dockerfile and HF metadata to README

Dockerfile

@@ -0,0 +1,52 @@
+# ============================================================
+# AuthorBot RAG API — Root Dockerfile for HuggingFace Spaces
+# ============================================================
+FROM python:3.11-slim AS builder
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    libpq-dev \
+    curl \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Copy and install Python dependencies from backend directory
+COPY backend/requirements.txt .
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# ── Production Stage ──────────────────────────────────────────
+FROM python:3.11-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libpq5 \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY --from=builder /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
+COPY --from=builder /usr/local/bin /usr/local/bin
+
+# Copy ONLY backend application code to /app
+COPY backend /app
+
+RUN mkdir -p /app/uploads /app/data/chroma /app/data/geo /app/logs
+
+# HuggingFace Spaces: run as non-root user (uid 1000)
+RUN adduser --disabled-password --gecos "" --uid 1000 appuser && \
+    chown -R appuser:appuser /app
+USER appuser
+
+# Pre-download models
+RUN python -c "from sentence_transformers import CrossEncoder; CrossEncoder('cross-encoder/ms-marco-MiniLM-L-6-v2')" || true
+RUN python -c "from sentence_transformers import SentenceTransformer; SentenceTransformer('sentence-transformers/all-MiniLM-L6-v2')" || true
+
+HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
+    CMD curl -f http://localhost:8080/health || exit 1
+
+EXPOSE 8080
+
+CMD ["sh", "-c", "alembic upgrade head && uvicorn app.main:app --host 0.0.0.0 --port 8080 --workers 2 --loop uvloop --http httptools"]

README.md

@@ -1,3 +1,13 @@
+---
+title: AuthorBot RAG
+emoji: 📚
+colorFrom: indigo
+colorTo: purple
+sdk: docker
+pinned: false
+app_port: 8080
+---
+
 # AuthorBot RAG Chatbot SaaS
 ### Production-grade AI book advisor for author websites