Improve application startup process and fix potential database issues

Refactors Dockerfile and entrypoint script for enhanced reliability, debugging, and single database migration.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: dec54137-d5a2-4406-8ad4-5f2f9fb110bf
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/5d315300-98fa-429a-abb0-4fdce6a2e3c9.jpg

replit.md

@@ -349,6 +349,14 @@ Preferred communication style: Simple, everyday language.
 - ✅ Created .env.example template for environment configuration
 - ✅ Optimized Docker Compose for maximum deployment compatibility
 
+### Docker Application Startup Fix (January 13, 2025)
+- ✅ Fixed application startup loop after database migrations
+- ✅ Cleaned up duplicate ENTRYPOINT declarations in Dockerfile
+- ✅ Simplified docker-entrypoint-simple.sh script with proper exec
+- ✅ Added debugging output to track application startup process
+- ✅ Reduced PostgreSQL timeout to 60 seconds (20 retries × 3s)
+- ✅ Enhanced startup script with Node.js version and directory checks
+
 ### Portainer Deployment Fix (January 10, 2025)
 - ✅ Resolved Docker image pull error "regisflow-regisflow:latest" in Portainer
 - ✅ Created local image building solution with "regisflow:latest" tag