Add health check script and improve Redis debugging

Dockerfile

@@ -22,10 +22,11 @@ RUN mkdir -p /tmp/data /app/data && \
 
 # Copy startup scripts
 COPY start.sh /app/code/
+COPY healthcheck.js /app/code/
 COPY nginx.conf /etc/nginx/sites-available/default
 
 # Make scripts executable
-RUN chmod +x /app/code/start.sh
+RUN chmod +x /app/code/start.sh /app/code/healthcheck.js
 
 # Install supervisord and netcat for process management and connectivity checks
 RUN apt-get update && \