ScaleTail is a curated collection of Docker Compose configurations for self-hosting 80+ services with a consistent Tailscale sidecar pattern. Each service directory contains a `compose.yaml` that defines a `tailscale` container (using `tailscale/tailscale:latest`) and an application container using `network_mode: service:tailscale`, enabling secure HTTPS access via Tailscale Serve or MagicDNS. The repository provides environment-driven configuration (`.env` files), health checks, and per-service READMEs. It is not a standalone application or library but a deployment template repository. The dominant character is 'application' as it facilitates deploying applications, though it is purely configuration and documentation. The pattern is highly reusable for any Docker-based self-hosted service wanting Tailscale integration.