Install backend deps at root level to avoid nested npm issue

Copy backend package.json to root and install there.
This avoids the nested directory npm install which was failing.

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -2,52 +2,35 @@ FROM node:20-slim
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Build timestamp: 2026-01-13T00:15
+# Build timestamp: 2026-01-13T00:20
 
-# Minimal test - just check if files exist
 WORKDIR /app
 
-# Create directories explicitly
-RUN mkdir -p backend
-
-# Test COPY commands one by one
-RUN echo "Step 1: Working directory set"
-
-COPY trigo-web/package.json ./package.json
-RUN echo "Step 2: Root package.json copied" && cat package.json | head -5
-
-COPY trigo-web/backend/package.json ./backend/package.json
-RUN echo "Step 3: Backend package.json copied" && ls -la backend/ && cat backend/package.json | head -10
-
-# Install only esbuild (smaller than yarn)
+# Install esbuild globally
 RUN npm install -g esbuild
-RUN echo "Step 4: esbuild installed"
 
-# Install root deps - this is simple, only dotenv
+# Copy only the backend package.json and install backend deps at root level
+# This avoids the nested npm install issue
+COPY trigo-web/backend/package.json ./package.json
 RUN npm install --omit=dev
-RUN echo "Step 5: Root deps installed"
-
-# Install backend deps - try with --ignore-scripts
-RUN echo "Step 6: Starting backend npm install..." && \
-    cd backend && \
-    npm install --omit=dev --ignore-scripts 2>&1 && \
-    echo "Step 6: Backend deps installed successfully" || \
-    (echo "Step 6: Backend npm install FAILED" && exit 1)
+RUN echo "Step 1: Dependencies installed" && ls -la node_modules/ | head -10
 
 # Copy backend source
+RUN mkdir -p backend
 COPY trigo-web/backend/src/ ./backend/src/
-RUN echo "Step 7: Backend source copied"
+RUN echo "Step 2: Backend source copied"
 
-# Build backend
+# Build backend with esbuild
 RUN mkdir -p backend/dist/backend/src && \
     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
-RUN echo "Step 8: Backend built"
+RUN echo "Step 3: Backend built"
 
 # Copy pre-built frontend
+RUN mkdir -p app
 COPY trigo-web/app/dist/ ./app/dist/
-RUN echo "Step 9: Frontend dist copied" && ls -la app/dist/
+RUN echo "Step 4: Frontend copied" && ls -la app/dist/
 
 # Copy public and other files
 COPY trigo-web/public/ ./public/
@@ -55,7 +38,7 @@ COPY trigo-web/.env ./.env
 COPY trigo-web/backend/.env ./backend/.env
 COPY trigo-web/backend/.env.local ./backend/.env.local
 COPY trigo-web/inc/ ./inc/
-RUN echo "Step 10: All files copied"
+RUN echo "Step 5: All files copied"
 
 ENV PORT=7860
 ENV HOST=0.0.0.0