docs(FR-2912): document web commands and fix preview:html sidebar scroll#7462

agatha197 wants to merge 4 commits into

05-16-docs_misc_document_re-login_required_notification_after_main_keypair_changelablup/backend.ai-webui:05-16-docs_misc_document_re-login_required_notification_after_main_keypair_changefrom

05-18-docs_fr-2912_document_docs-toolkit_build_web_and_serve_web_commands_in_readmelablup/backend.ai-webui:05-18-docs_fr-2912_document_docs-toolkit_build_web_and_serve_web_commands_in_readmeCopy head branch name to clipboard