fix(docker): improve startup script with better error handling and logging

Added verbose logging to diagnose runtime errors:
- Log container startup time and environment
- Use curl -f flag to fail on HTTP errors
- Report downloaded file sizes
- List ONNX directory contents before starting server

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

Dockerfile

@@ -2,7 +2,7 @@ FROM node:20-slim
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Build timestamp: 2026-01-17T19:35
+# Build timestamp: 2026-01-27T22:56
 # Note: ONNX files kept in LFS per HF policy, downloaded at startup via curl
 
 WORKDIR /app
@@ -51,6 +51,10 @@ RUN cat <<'STARTUP' > start.sh
 #!/bin/bash
 set -e
 
+echo "=== Container startup at $(date) ==="
+echo "Working directory: $(pwd)"
+echo "Node version: $(node --version)"
+
 HF_BASE="https://huggingface.co/spaces/k-l-lambda/trigo/resolve/main/trigo-web/app/dist"
 
 # List of ONNX files to download (relative to app/dist)
@@ -64,11 +68,18 @@ for file in "${ONNX_FILES[@]}"; do
     dir=$(dirname "app/dist/$file")
     mkdir -p "$dir"
     echo "  Downloading $file..."
-    curl -sL "$HF_BASE/$file" -o "app/dist/$file"
+    if curl -fsSL "$HF_BASE/$file" -o "app/dist/$file"; then
+        size=$(stat -c%s "app/dist/$file" 2>/dev/null || echo "unknown")
+        echo "    Downloaded: $size bytes"
+    else
+        echo "    WARNING: Failed to download $file"
+    fi
 done
-echo "ONNX files downloaded successfully."
 
-# Start the server
+echo "=== Checking downloaded files ==="
+ls -la app/dist/onnx/20251230-trigo-value-llama-l6-h64-it2_251221-value0.01-pretrain/ 2>/dev/null || echo "ONNX directory not found"
+
+echo "=== Starting server ==="
 exec npx tsx docker-entry.ts
 STARTUP
 RUN chmod +x start.sh