I have initialized https://hub.docker.com/r/jboss/keycloak/ on my Digital Ocean Docker Droplet.
$docker run -e KEYCLOAK_USER=admin -e -p 8080:8080 KEYCLOAK_PASSWORD={password with upcase etc.} jboss/keycloak
success
Everything worked well and the server started in the Droplets IP address on a port :8080.
Problems started when I entered the admin console from the UI in the URL. There was a message: "HTTPS required". This was a real issue and the only solution I have found is to login to the Keycloak from the console and to change the setting of HTTPS=required from admin console without the UI.
I then opened the bash for my Docker container :
$docker exec -it keycloak bash
success
As I entered my command to login in the keycloak/bin folder:
cd keycloak/bin
keycloak/bin $./kcadm.sh config credentials --server http://<droplet IP>:8080/auth --realm master --user admin --password {password with upcase etc.}
the bash freezes and gives a timeout message after some time
Reason for logging in from bash would be complete this:
keycloak/bin $ ./kcadm.sh update realms/master -s sslRequired=NONE.
which would hopefully solve the original problem of HTTPS required.