Fase 0: scaffold monorepo, SvelteKit skeleton, and dev infrastructure

- Turborepo + pnpm workspaces with apps/web and packages/types
- SvelteKit app: Tailwind, Paraglide i18n (en/es), keycloak-js, Supabase client,
  auth/collective stores, PWA service worker skeleton, all route placeholders
- packages/types: domain types (User, Collective, ShoppingList, etc.) and
  database.ts placeholder for generated types
- Justfile with dev, db-*, kc-*, build, backup, restore, deploy recipes
- infra/docker-compose.dev.yml: Postgres 15, GoTrue, PostgREST, Realtime v2.83,
  Storage, Kong (port 8001), Studio, Keycloak 24
- infra/docker-compose.prod.yml, kong.yml, db-init scripts, backup/deploy scripts
- keycloak/realm-export.json with colectivo realm and 5 dev test users
- supabase/config.toml and seed.sql with sample collective and items
- GitHub Actions: ci.yml (lint+typecheck+build) and deploy.yml (GHCR + SSH)
- .env.example documenting all required variables
- Fixed docker-compose issues: Studio image tag, Kong port conflict (8001),
  internal role passwords init script, Realtime METRICS_JWT_SECRET/APP_NAME

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,70 @@
+# ─────────────────────────────────────────────────────────────────────────────
+# Colectivo — environment variables
+# Copy to .env and fill in real values. Never commit .env to version control.
+# ─────────────────────────────────────────────────────────────────────────────
+
+# ── Supabase ──────────────────────────────────────────────────────────────────
+
+# URL of the self-hosted Supabase instance (Kong gateway)
+PUBLIC_SUPABASE_URL=http://localhost:8001
+
+# Supabase anon key (public, safe to expose in the browser)
+# Generated during `supabase start` or set manually in supabase/config.toml
+PUBLIC_SUPABASE_ANON_KEY=
+
+# Supabase service role key (private — never expose in the browser)
+# Used only in Edge Functions or server-side scripts
+SUPABASE_SERVICE_ROLE_KEY=
+
+# JWT secret — MUST be set to the Keycloak RS256 public key (PEM format, one line)
+# Supabase uses this to validate Keycloak-issued JWTs for RLS
+# Rotate simultaneously with Keycloak signing key rotation
+SUPABASE_JWT_SECRET=
+
+# ── Keycloak ──────────────────────────────────────────────────────────────────
+
+# Public URL of the Keycloak server (used by the browser for OIDC redirects)
+PUBLIC_KEYCLOAK_URL=http://localhost:8080
+
+# Keycloak realm name
+PUBLIC_KEYCLOAK_REALM=colectivo
+
+# Keycloak client ID (public PKCE client — no secret)
+PUBLIC_KEYCLOAK_CLIENT_ID=colectivo-web
+
+# Keycloak admin credentials (used by infra scripts only — never in app code)
+KEYCLOAK_ADMIN=admin
+KEYCLOAK_ADMIN_PASSWORD=
+
+# ── Email (Resend) ────────────────────────────────────────────────────────────
+
+# Resend API key — used by Edge Functions to send invitation emails
+RESEND_API_KEY=
+
+# From address for outgoing emails
+RESEND_FROM_EMAIL=noreply@yourdomain.com
+
+# ── Backup (Backblaze B2) ─────────────────────────────────────────────────────
+
+B2_BUCKET_NAME=colectivo-backups
+B2_APPLICATION_KEY_ID=
+B2_APPLICATION_KEY=
+
+# ── App ───────────────────────────────────────────────────────────────────────
+
+# Publicly accessible origin of the app (no trailing slash)
+# Used in Edge Functions to build invitation URLs
+PUBLIC_APP_URL=http://localhost:5173
+
+# ── Docker / Infra ────────────────────────────────────────────────────────────
+
+# Postgres superuser password (used by Supabase internally)
+POSTGRES_PASSWORD=
+
+# Supabase dashboard username/password (Studio)
+DASHBOARD_USERNAME=supabase
+DASHBOARD_PASSWORD=
+
+# Production SSH target for deploy script
+DEPLOY_HOST=user@your-vps-ip
+DEPLOY_PATH=/opt/colectivo