Fix Dockerfile working directory for frontend

Dockerfile

@@ -1,4 +1,4 @@
-# LifeLine AI - Spaces-ready Dockerfile (clean, repo-root centric)
+# LifeLine AI - Spaces-ready Dockerfile
 FROM node:20-slim
 
 LABEL maintainer="LifeLine Team" \
@@ -9,33 +9,39 @@ ENV NODE_ENV=production \
     PYTHONUNBUFFERED=1 \
     DEBIAN_FRONTEND=noninteractive
 
+# Root workspace
 WORKDIR /app
 
-# Install minimal system deps (python + build tools)
+# Install system deps
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
          python3 python3-pip ca-certificates curl build-essential \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy Node package manifests and install Node deps from repo root
-COPY package*.json ./
+# Copy entire repo first
+COPY . .
+
+# Move into frontend folder
+WORKDIR /app/lifeline-ai
+
+# Install frontend dependencies
 RUN if [ -f package-lock.json ]; then \
       npm ci --no-audit --no-fund; \
     else \
       npm install --no-audit --no-fund; \
     fi
 
-# Install Python dependencies from repo-root requirements.txt only
+# Build frontend
+RUN npm run build
+
+# Install backend dependencies if available
+WORKDIR /app
 COPY requirements.txt .
 RUN pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir -r requirements.txt
 
-# Copy the rest of the repository and build the Next.js frontend
-COPY . .
-RUN npm run build
-
-# Expose the UI port for Hugging Face Spaces
+# Expose HF Space port
 EXPOSE 7860
 
-# Start backend (if present) on localhost:8000 in background, then run Next.js frontend on 7860
-CMD ["sh", "-c", "uvicorn backend.app.main:app --host 127.0.0.1 --port 8000 2>/dev/null & exec npm run start -- -p 7860"]
+# Run backend + frontend
+CMD ["sh", "-c", "uvicorn backend.app.main:app --host 127.0.0.1 --port 8000 2>/dev/null & cd /app/lifeline-ai && exec npm run start -- -p 7860"]