deploy_skill: soporte para Coolify v4.1.2 (API /applications 404) + flujo UI Playwright

Aprendido desplegando cotizador (Next.js+FastAPI+Postgres, Docker Compose,
repo privado) en coolify.urieljareth.org (v4.1.2):

- Documenta que /applications/* devuelve 404 en esta instancia y que configurar
  apps git build-from-source solo es posible por la UI web.
- Nuevos scripts scripts/coolify-ui/: coolify-login.mjs (guarda storageState) y
  Configure-CoolifyComposeApp.mjs (build pack -> Docker Compose, Reload Compose
  File, env vars por Developer view, dominios por servicio).
- references/coolify-4.1.2-notes.md: mapa de API funcional/404, gotchas (BOM
  UTF-8 rompe el parser YAML de Coolify; Reload Compose File obligatorio; pin de
  dominios por servicio o 503; no encolar deploys concurrentes; PowerShell
  [IO.File]::ReadAllText para payloads de llaves).
- env.local.template.ps1: COOLIFY_EMAIL/COOLIFY_PASSWORD para la UI.
- SKILL.md/TOOLS.md: seccion "instance reality" y flujo UI paso a paso.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

deploy_skill/references/templates/Dockerfile.node

@@ -0,0 +1,26 @@
+# Minimal compliant Dockerfile for a Node app deployed to this Coolify instance.
+#
+# Hard rules followed (see docs/AGENTS-coolify-apps.md):
+#   - No published host ports 80/443 (Traefik routes them).
+#   - Real listening port is set via ports_exposes in Coolify (here 8080).
+#   - Healthcheck endpoint must NOT depend on the DB being reachable at boot.
+#
+# Replace the build/run commands with the ones that match your framework.
+
+FROM node:20-alpine AS build
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM node:20-alpine AS run
+WORKDIR /app
+ENV NODE_ENV=production
+ENV PORT=8080
+COPY --from=build /app /app
+# Cheap endpoint; implement /health in your app to return 200 without DB.
+HEALTHCHECK --interval=30s --timeout=5s --retries=3 --start-period=20s \
+  CMD wget -qO- http://localhost:8080/health || exit 1
+EXPOSE 8080
+CMD ["npm", "start"]