Take the stack/swarm down:
docker stack rm syncldap
Bring the stack/swarm up with HTTPS support execute this command in the sync-endpoint-default-setup folder:
docker stack deploy -c docker-compose.yml -c docker-compose-https.yml syncldap
Also, I encourage you to take the ODK-X Sync-Endpoint survey as our intern is working to improve things: Survey form - ODK-X Sync Endpoint