Fix: Change SDK from static to docker and add Dockerfile at root

Dockerfile

@@ -0,0 +1,62 @@
+# ExamInsight - Hugging Face Spaces Docker Deployment
+# Multi-stage build for React frontend + FastAPI backend
+
+# =============================================================================
+# Stage 1: Build React Frontend
+# =============================================================================
+FROM node:20-slim AS frontend-builder
+
+WORKDIR /app/frontend
+
+# Copy package files
+COPY chatkit/frontend/package*.json ./
+
+# Install dependencies
+RUN npm ci --legacy-peer-deps
+
+# Copy source files
+COPY chatkit/frontend/ ./
+
+# Build for production (output to dist/)
+RUN npm run build
+
+# =============================================================================
+# Stage 2: Python Backend + Serve Frontend
+# =============================================================================
+FROM python:3.11-slim
+
+# Set environment variables
+ENV PYTHONUNBUFFERED=1
+ENV PYTHONDONTWRITEBYTECODE=1
+
+# Create non-root user for HF Spaces
+RUN useradd -m -u 1000 user
+USER user
+ENV HOME=/home/user
+ENV PATH=/home/user/.local/bin:$PATH
+
+WORKDIR $HOME/app
+
+# Install Python dependencies
+COPY --chown=user chatkit/backend/pyproject.toml ./
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir .
+
+# Copy backend code
+COPY --chown=user chatkit/backend/app ./app
+
+# Copy report template
+COPY --chown=user report-template.html ./
+
+# Copy built frontend from Stage 1
+COPY --from=frontend-builder --chown=user /app/frontend/dist ./static
+
+# Expose port (HF Spaces uses 7860)
+EXPOSE 7860
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:7860/health')"
+
+# Run the server
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]

README.md

@@ -3,8 +3,7 @@ title: ClassLens
 emoji: 📊
 colorFrom: green
 colorTo: pink
-sdk: static
-app_file: backend/static/report-template.html
+sdk: docker
 license: mit
 ---