Update Dockerfile

Dockerfile

@@ -1,17 +1,17 @@
 # 1. Use Node 20 Slim (Debian)
 FROM node:20-slim
 
-# --- CACHE BUSTER: FORCE V2 UPGRADE ---
-# We update this timestamp to today's date to invalidate all previous caches.
-ENV N8N_VERSION_FORCE=v2_upgrade_dec16_final
+# --- CACHE BUSTER ---
+# Updated timestamp to force this new logic to deploy
+ENV N8N_VERSION_FORCE=v2_watchdog_upgrade_dec18
 
 # 2. Install System Tools
+# We add 'curl' because we need it to check n8n's health locally
 RUN apt-get update && \
-    apt-get install -y graphicsmagick git tini postgresql-client && \
+    apt-get install -y graphicsmagick git tini postgresql-client curl && \
     rm -rf /var/lib/apt/lists/*
 
-# 3. Install n8n V2 (Explicitly Pinned)
-# We specifically request version 2.0.2 so npm cannot accidentally give us v1.
+# 3. Install n8n V2.0.2 (Pinned for Stability)
 RUN npm cache clean --force && \
     npm install -g n8n@2.0.2
 
@@ -22,15 +22,20 @@ RUN mkdir -p /home/node/.n8n && \
 # 5. Switch User
 USER node
 
-# 6. Self-Healing Watchdog (Optimized for V2)
+# 6. The "Internal Affairs" Watchdog
+# This script waits for n8n to start, then checks n8n's own health status every 60s.
+# If n8n reports "503 Database not ready", this script kills the container to force a restart.
 RUN echo '#!/bin/sh' > /home/node/start.sh && \
-    echo 'echo "--- Starting n8n V2.0.2 with Watchdog ---"' >> /home/node/start.sh && \
+    echo 'echo "--- Starting n8n V2 with Healthz Monitor ---"' >> /home/node/start.sh && \
     echo 'n8n start &' >> /home/node/start.sh && \
     echo 'N8N_PID=$!' >> /home/node/start.sh && \
+    echo 'echo "Waiting 30s for boot..."' >> /home/node/start.sh && \
+    echo 'sleep 30' >> /home/node/start.sh && \
     echo 'while true; do' >> /home/node/start.sh && \
     echo '  sleep 60' >> /home/node/start.sh && \
-    echo '  if ! pg_isready -h "$DB_POSTGRESDB_HOST" -p "$DB_POSTGRESDB_PORT" -U "$DB_POSTGRESDB_USER" -d "$DB_POSTGRESDB_DATABASE" -t 5; then' >> /home/node/start.sh && \
-    echo '    echo "❌ Database connection lost! Restarting..."' >> /home/node/start.sh && \
+    echo '  # Check n8n internal health endpoint' >> /home/node/start.sh && \
+    echo '  if ! curl -f http://localhost:7860/healthz > /dev/null 2>&1; then' >> /home/node/start.sh && \
+    echo '    echo "❌ n8n is sick (503/Crash)! Killing process to force restart..."' >> /home/node/start.sh && \
     echo '    kill $N8N_PID' >> /home/node/start.sh && \
     echo '    exit 1' >> /home/node/start.sh && \
     echo '  fi' >> /home/node/start.sh && \
@@ -44,9 +49,7 @@ ENV DB_POSTGRESDB_SCHEMA=public
 ENV N8N_PORT=7860
 ENV N8N_HOST=0.0.0.0
 ENV N8N_ENFORCE_SETTINGS_FILE_PERMISSIONS=false
-# V2 Requirement: Enable Task Runners
 ENV N8N_RUNNERS_ENABLED=true
-# V2 Requirement: Secure Environment Variables
 ENV N8N_BLOCK_ENV_ACCESS_IN_NODE=true
 
 # 8. Open Port