Debug: restore Node server with startup wrapper

Dockerfile

@@ -2,19 +2,48 @@ FROM node:20-slim
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Build timestamp: 2026-01-13T02:30
+# Build timestamp: 2026-01-13T02:45
 
 WORKDIR /app
 
-# Minimal test - just serve static files with Python
-RUN apt-get update && apt-get install -y python3 && rm -rf /var/lib/apt/lists/*
+# Install esbuild globally
+RUN npm install -g esbuild
+
+# Copy backend package.json and install deps at root level
+COPY trigo-web/backend/package.json ./package.json
+RUN npm install --omit=dev
+
+# Copy backend source and build
+RUN mkdir -p backend backend/dist/backend/src
+COPY trigo-web/backend/src/ ./backend/src/
+
+# Copy inc folder (needed for esbuild)
+COPY trigo-web/inc/ ./inc/
+
+RUN esbuild backend/src/server.ts --bundle --platform=node --target=node20 --format=esm \
+    --outfile=backend/dist/backend/src/server.js \
+    --external:express --external:socket.io --external:cors --external:dotenv --external:uuid
 
 # Copy frontend dist
 COPY trigo-web/app/dist/ ./app/dist/
 
+# Copy env files
+COPY trigo-web/backend/.env ./backend/.env
+COPY trigo-web/backend/.env.local ./backend/.env.local
+
 ENV PORT=7860
+ENV HOST=0.0.0.0
+ENV NODE_ENV=production
 
 EXPOSE 7860
 
-# Test with simple Python HTTP server
-CMD cd app/dist && python3 -m http.server 7860
+# Create a wrapper script to catch errors
+RUN echo '#!/bin/sh' > /start.sh && \
+    echo 'echo "Starting server..."' >> /start.sh && \
+    echo 'node --version' >> /start.sh && \
+    echo 'pwd' >> /start.sh && \
+    echo 'ls -la backend/dist/backend/src/server.js' >> /start.sh && \
+    echo 'exec node backend/dist/backend/src/server.js' >> /start.sh && \
+    chmod +x /start.sh
+
+CMD ["/start.sh"]