Installer uses the current directory instead of a path prompt.
Document systemd cloudflared and Compose files in the install directory.
Stop telling operators to put the Discord bot token in .env.
Document first-visit local admin and Admin-only Discord setup.
Document managing SoundDock with docker compose in /opt/sounddock.
Document optional Discord sign-in and registration whitelist.
Use SD_ env var names in the wiki.
Rewrite wiki for operators and developers. Drop em dashes.
Add installer, extras, and FAQ.