feat: docker compose dev environment

Replaces the bare-metal `composer run dev` workflow with a fully
containerized 9-service stack orchestrated by docker compose. Single
command brings up the full app — three subdomains (marketing /
account / admin) reachable via Traefik with TLS, MariaDB + Valkey
+ Mailpit + Vite HMR + Horizon + scheduler all wired in.

Components:
- docker-compose.yml: traefik, app (php-fpm), web (nginx), mariadb,
  valkey, mailpit, vite, horizon, scheduler.
- docker/: Dockerfiles, nginx config, entrypoint scripts.
- Makefile: convenience targets (up / down / logs / shell / migrate
  / seed / test / pint / etc).
- .env.docker.example: template for Docker-stack environment vars
  (separate from website/.env so bare-metal devs aren't disrupted).
- website/vite.config.ts: server.host / origin / hmr / cors hooks
  driven by VITE_HOST / VITE_ORIGIN / VITE_HMR_HOST so the same
  config serves both bare-metal and Docker.
- website/bootstrap/app.php: redirectGuestsTo() now uses
  request()->getScheme() so http: dev hosts don't get force-https
  redirects.
- composer.json: drops laravel/sail (replaced by this stack).
- docs/superpowers/specs/2026-04-25-docker-compose-dev-environment-design.md:
  full design spec.

Bare-metal `composer run dev` workflow stays usable for anyone who
prefers it — Docker stack reads .env.docker, doesn't fight
website/.env.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.env.docker.example

@@ -0,0 +1,137 @@
+# ==============================================================================
+# EZSCALE — Docker Compose dev environment
+# Copy to .env.docker and fill in third-party credentials.
+# This file is loaded by app, horizon, and scheduler containers.
+# ==============================================================================
+
+APP_NAME="EZSCALE Billing"
+APP_ENV=local
+# APP_KEY is intentionally NOT set here. The entrypoint runs `php artisan key:generate`
+# which writes the key to website/.env. If APP_KEY were defined here as empty,
+# the empty env var would override the .env file value (env_file beats dotenv).
+APP_DEBUG=true
+APP_URL=http://ezscale.docker.localhost
+
+APP_LOCALE=en
+APP_FALLBACK_LOCALE=en
+APP_FAKER_LOCALE=en_US
+
+APP_MAINTENANCE_DRIVER=file
+
+BCRYPT_ROUNDS=10
+
+LOG_CHANNEL=stack
+LOG_STACK=single
+LOG_DEPRECATIONS_CHANNEL=null
+LOG_LEVEL=debug
+
+# ==============================================================================
+# Database — points at the `mariadb` compose service
+# ==============================================================================
+DB_CONNECTION=mysql
+DB_HOST=mariadb
+DB_PORT=3306
+DB_DATABASE=ezscale_billing
+DB_USERNAME=ezscale
+DB_PASSWORD=ezscale_local
+DB_ROOT_PASSWORD=root
+
+# ==============================================================================
+# Cache / sessions / queues — points at the `valkey` compose service
+# ==============================================================================
+SESSION_DRIVER=redis
+SESSION_LIFETIME=120
+SESSION_ENCRYPT=false
+SESSION_PATH=/
+SESSION_DOMAIN=.ezscale.docker.localhost
+
+BROADCAST_CONNECTION=log
+FILESYSTEM_DISK=local
+QUEUE_CONNECTION=redis
+CACHE_STORE=redis
+
+REDIS_CLIENT=phpredis
+REDIS_HOST=valkey
+REDIS_PASSWORD=null
+REDIS_PORT=6379
+
+# ==============================================================================
+# Subdomain routing
+# ==============================================================================
+DOMAIN_MARKETING=ezscale.docker.localhost
+DOMAIN_ACCOUNT=account.ezscale.docker.localhost
+DOMAIN_ADMIN=admin.ezscale.docker.localhost
+
+# ==============================================================================
+# Mail — points at the `mailpit` compose service
+# ==============================================================================
+MAIL_MAILER=smtp
+MAIL_SCHEME=null
+MAIL_HOST=mailpit
+MAIL_PORT=1025
+MAIL_USERNAME=null
+MAIL_PASSWORD=null
+MAIL_FROM_ADDRESS="noreply@ezscale.cloud"
+MAIL_FROM_NAME="${APP_NAME}"
+
+# ==============================================================================
+# Stripe — fill with your test-mode keys
+# ==============================================================================
+STRIPE_KEY=
+STRIPE_SECRET=
+STRIPE_WEBHOOK_SECRET=
+
+# ==============================================================================
+# PayPal — sandbox credentials
+# ==============================================================================
+PAYPAL_MODE=sandbox
+PAYPAL_SANDBOX_CLIENT_ID=
+PAYPAL_SANDBOX_CLIENT_SECRET=
+
+# ==============================================================================
+# Discord admin alerts (optional)
+# ==============================================================================
+DISCORD_WEBHOOK_URL=
+
+# ==============================================================================
+# Provisioning APIs — external services, fill if you need to test provisioning
+# ==============================================================================
+VIRTFUSION_API_URL=
+VIRTFUSION_API_KEY=
+PTERODACTYL_API_URL=
+PTERODACTYL_API_KEY=
+SYNERGYCP_API_URL=
+SYNERGYCP_API_KEY=
+ENHANCE_API_URL=
+ENHANCE_API_KEY=
+
+# ==============================================================================
+# Screenshot Authentication (Dev/Local Only)
+# ==============================================================================
+SCREENSHOT_AUTH_ENABLED=false
+SCREENSHOT_TOKEN=
+
+# ==============================================================================
+# Support Ticket Email Integration (IMAP) — optional
+# ==============================================================================
+SUPPORT_EMAIL=support@ezscale.cloud
+TICKET_EMAIL_POLLING=false
+IMAP_HOST=outlook.office365.com
+IMAP_PORT=993
+IMAP_ENCRYPTION=ssl
+IMAP_USERNAME=
+IMAP_PASSWORD=
+IMAP_VALIDATE_CERT=true
+IMAP_PROTOCOL=imap
+IMAP_FOLDER=INBOX
+
+# ==============================================================================
+# ServerHunter Integration (optional)
+# ==============================================================================
+SERVERHUNTER_API_KEY=
+
+# ==============================================================================
+# Vite — Laravel Vite plugin reads this
+# ==============================================================================
+VITE_APP_NAME="${APP_NAME}"
+VITE_DEV_SERVER_URL=http://vite.ezscale.docker.localhost