Add standalone addon management script for post-install service toggling

[hessius]

Summary

Add a way for users to install/enable optional addon services (Watchtower, Tailscale, Home Assistant MQTT) after the initial installation, without re-running the full installer.

Problem

Currently, addon services (Watchtower for auto-updates, Tailscale for remote access, Home Assistant MQTT integration) can only be enabled during the initial install.sh / install.ps1 run. If a user skips them during install and later decides they want them, they have to either:

1. Re-run the full installer (which re-prompts for everything)
2. Manually edit .env and COMPOSE_FILES, download the extra compose files, and restart — error-prone for non-technical users

Proposed Solution

Option A: Standalone addon management script

Create scripts/addons.sh (and scripts/addons.ps1 for Windows) that:

1. Detects the existing MeticAI install directory
2. Reads the current .env to see which addons are already enabled
3. Presents a simple menu:

   MeticAI Addon Manager
   =====================
   1. [x] Watchtower (auto-updates)     — currently enabled
   2. [ ] Tailscale (remote access)      — not installed
   3. [ ] Home Assistant MQTT            — not installed
   
   Enter number to toggle, or 'q' to quit:
   

4. When enabling an addon:
   • Downloads the required compose file if missing
   • Prompts for any required config (e.g. Tailscale auth key)
   • Updates COMPOSE_FILES in .env
   • Restarts the container with the new compose stack
5. When disabling an addon:
   • Removes the compose file reference from COMPOSE_FILES
   • Restarts the container

Option B: Web UI integration

Add an "Addons" section to the Settings page in the web UI that shows available addon services with toggle switches. This would call a new API endpoint that modifies .env and restarts the compose stack.

Recommendation

Start with Option A (script-based) since it works even when the web UI isn't accessible, and it's consistent with the existing install/update script pattern. Option B can be added later as a convenience layer.

Terminal help for existing users

For users who already have MeticAI installed, provide a one-liner they can copy from the README or web UI:

# Install/manage addons
curl -fsSL https://raw.githubusercontent.com/hessius/MeticAI/main/scripts/addons.sh | bash

Acceptance Criteria

• scripts/addons.sh can enable/disable Watchtower, Tailscale, and Home Assistant MQTT
• Script detects existing installation and reads current config
• Downloads missing compose files automatically
• Updates .env COMPOSE_FILES correctly
• Restarts the container stack after changes
• Works on Linux and macOS
• PowerShell equivalent for Windows (scripts/addons.ps1)
• README updated with addon management instructions

[hessius]

v2.1.0-beta.7 Milestone Audit

Status: ✅ Fully Implemented — All Acceptance Criteria Met

Criterion	Status	Evidence
scripts/addons.sh enables/disables 3 addons	✅	268 lines; toggle functions for Watchtower, Tailscale, Home Assistant MQTT
Script detects existing install + reads config	✅	Reads .env for COMPOSE_FILES to show current status
Downloads missing compose files	✅	Automatically fetches docker-compose.*.yml when enabling
Updates .env COMPOSE_FILES correctly	✅	Toggles compose file references in/out
Restarts container stack after changes	✅	docker compose up -d --remove-orphans
Works on Linux and macOS	✅	Bash script, executable permissions set
PowerShell equivalent for Windows	✅	scripts/addons.ps1 (210 lines) with matching functionality
README updated with instructions	✅	Full section with one-liner: curl -fsSL .../addons.sh | bash

Menu UI: Both scripts show [x]/[ ] status indicators, let users enter a number to toggle, and q to quit.

[hessius]

Shipped in v2.1.0 — see release notes