(1) run a docker image.

git clone https://github.com/anantjakhmola/Docker_project.git
# Navigate to file location 
docker build . -t  dart_flutter
docker run -p 8443:8443 -p 8080:8080 -it dart_flutter_web bash

(2) run vscode at code-server

/works/code-server /works/development/flutter_web/examples/hello_world  --allow-http --no-auth

(3) and open 'http://127.0.0.1:8443/' at your browser

Webdev

(1) Terminal -> New Terminal on VSCODE

(2) on Terminal

root@8e5699b9caa4:/works/w# pub get
root@8e5699b9caa4:/works/w# webdev serve --hostname=0.0.0.0

(3) and, open 'http://127.0.0.1:8080/' at your browser