Currently there is no built-it SSL support in on-premise package, so you should add an NGINX or other web server with SSL in front of Docker instance which will proxy requests to Docker instance. This is planned to be added in future as a built-it functionality.
Jet Bridge package include JWT_VERIFY_TOKEN inside it to verify requests from the frontend. By default it uses our Cloud JWT_VERIFY_TOKEN, but for on-premise you have different JWT key pair (randomly generated on install) so you need to change it. You should make it equals to the JWT_VERIFY_KEY value in your on-premise package config.
# Jet Bridge setting
JWT_VERIFY_KEY=-----BEGIN PUBLIC KEY-----\nMIICIjANBgkqhkiG9w0BAQEFAAOC...
# If using Jet Bridge for Django
JET_JWT_VERIFY_KEY=-----BEGIN PUBLIC KEY-----\nMIICIjANBgkqhkiG9w0BAQEFAAOC...