[BUG] Fix warning issue in password-change UI docker container

[Aravinda-HWK]

Steps to Reproduce

1. Run the silver mail system.
2. You can see a warning in the Docker container about changing the password.

Expected Behavior

The warning should be checked, and fix the issue with that warning.

Actual Behavior

The warning is showing in the Docker container of the changing-password UI.

Relevant Logs / Screenshots

Logs in that container:

Loaded domain from config: aravindahwk.org

🔍 Searching for SSL certificates for domain: aravindahwk.org
   Checking: /etc/letsencrypt/live/aravindahwk.org/fullchain.pem
   Checking: /etc/letsencrypt/live/aravindahwk.org/privkey.pem
✓ Found certificates for domain: aravindahwk.org

✓ SSL Certificate: /etc/letsencrypt/live/aravindahwk.org/fullchain.pem
✓ SSL Key: /etc/letsencrypt/live/aravindahwk.org/privkey.pem
┌─────────────────────────────────────────────────┐
│  Silver Mail - Password Change UI Server       │
│  🔒 HTTPS Enabled                               │
└─────────────────────────────────────────────────┘

✓ HTTPS Server: https://localhost:3443
✓ Change password UI: https://localhost:3443/
✓ API Proxy: https://localhost:3443/api/thunder/*
✓ Thunder API: https://thunder-server:8090
✓ Health check: https://localhost:3443/health
✓ Frontend path: /app/frontend

🔒 SSL/TLS enabled with provided certificates

Press Ctrl+C to stop the server

↪️  HTTP redirect enabled on port 3001 → HTTPS port 3443