ci: Coolify autodeploy from main; migrate-on-boot and split dev/prod compose

- Add Nitro plugin to apply Drizzle migrations on server boot (skips when
  DATABASE_URL is unset, e.g. during build).
- Split compose: docker-compose.dev.yml (hot-reload + Postgres) vs
  docker-compose.yml (production/self-host, env-driven, Coolify-deployable).
- Add .dockerignore; parameterise compose env; document the autodeploy
  decision (Coolify watches main, no CI workflow needed) in ADR 0003 and
  plan.md T12.

package.json

@@ -2,6 +2,7 @@
   "name": "andon",
   "type": "module",
   "private": true,
+  "packageManager": "pnpm@11.0.9",
   "scripts": {
     "build": "nuxt build",
     "dev": "nuxt dev",
@@ -14,7 +15,10 @@
     "typecheck": "nuxt typecheck",
     "db:generate": "drizzle-kit generate",
     "db:migrate": "tsx server/db/migrate.ts",
-    "db:verify": "tsx scripts/verify-db.ts"
+    "db:verify": "tsx scripts/verify-db.ts",
+    "docker:dev": "docker compose -f docker-compose.dev.yml up",
+    "docker:dev:build": "docker compose -f docker-compose.dev.yml up --build",
+    "docker:dev:down": "docker compose -f docker-compose.dev.yml down"
   },
   "dependencies": {
     "drizzle-orm": "^0.45.2",