deploy.sh: use 18080/18443 for vhost ports instead of 80/443

- Avoid conflict with nginx/apache on common ports
- init_db.py now generates frps.ini at init time
- deploy.sh verifies frps.ini exists before starting frps

init_db.py

@@ -1,11 +1,14 @@
 #!/usr/bin/env python3
-"""Initialize the frps-manager database."""
+"""Initialize the frps-manager database and generate frps.ini."""
 import os
 import sys
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
-from app import app, db, seed_admin
+from app import app, db, seed_admin, write_frps_config
 
 with app.app_context():
     db.create_all()
     seed_admin()
-    print("Database initialized successfully")
+    # Generate frps.ini so frps.service can start on a fresh machine
+    content = write_frps_config()
+    print("Database initialized successfully")
+    print("frps.ini generated at runtime/conf/frps.ini")