Enhance entrypoint script with a helper function for environment variable retrieval; improve PostgreSQL connection logic. Update installer script to add spacing for readability in service wait function.

install_adventurelog.sh

@@ -484,6 +484,7 @@ wait_for_services() {
     
     local max_attempts=30
     local attempt=1
+    
     while [ $attempt -le $max_attempts ]; do
         if curl -s -o /dev/null -w "%{http_code}" "$FRONTEND_ORIGIN" | grep -q "200\|404\|302"; then
             log_success "Frontend is responding"