Use full node:20 image and add verbose npm install

- Switch from node:20-slim to node:20 for better dependency support
- Add verbose logging to app npm install to diagnose failures

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

Dockerfile

@@ -1,8 +1,8 @@
-FROM node:20-slim
+FROM node:20
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Build timestamp: 2026-01-12T23:00
+# Build timestamp: 2026-01-12T23:10
 
 RUN apt-get update && apt-get install -y curl git && rm -rf /var/lib/apt/lists/*
 
@@ -21,9 +21,9 @@ COPY trigo-web/backend/package-lock.json ./backend/package-lock.json
 # Install build tools
 RUN npm install -g tsx jison typescript esbuild
 
-# Install deps
+# Install deps with verbose output
 RUN npm install --omit=dev
-RUN cd app && npm install
+RUN cd app && npm install --loglevel verbose 2>&1 || (echo "APP NPM INSTALL FAILED" && exit 1)
 RUN cd backend && npm install
 
 # Copy source files