[Feature Request] Allow openvscode-server to specify URL path prefix

[BorisPolonsky]

For running on a k8s cluster with multiple users, we would like to route traffic to each openvscode-server with different subpath, e.g. https://my-website.com/user-123/vscode/ . We would like to request something like this: openvscode-server --base-url=http://my-website.com/user-123/vscode/.

Related user cases and feature implementations

• Allow code-server to specify URL path prefix in serve-local microsoft/vscode-remote-release#7032
• Configure web server base path microsoft/vscode#202491