@Oren Thank you so much for your efforts. I've tried your suggestion without success. I'm sure I restart the whole service with 'docker-compose down', and then 'up -d.'
By the way, did you add the line in the docker-compose.yml? The file doesn't accept '=' for key value mapping. So, I used following lines.

webserver:
command:
- webserver
container_name: clearml-webserver
environment:
WEBSERVER__fileBaseUrl: "http//192.168.1.145:8081"
# CLEARML_SERVER_SUB_PATH : clearml-web # Allow Clearml to be served with a URL path prefix.
image: allegroai/clearml:latest
restart: unless-stopped
depends_on:
- apiserver