feat(01-01): Next.js app + Docker Compose stack with network segmentation

- Next.js 15 app with Tailwind CSS v4, standalone output for Docker
- Root layout with de locale, page with Tessera placeholder
- Multi-stage Dockerfile for web with monorepo root context
- Docker Compose with 4 services: traefik, web, api, db
- Three segregated networks: frontend-net, backend-net, data-net (internal)
- Traefik v2.11 reverse proxy routing / to web, /api to api
- API strip prefix middleware for clean routing
- PostgreSQL 16-alpine with health checks and named volume
- Fixed API Dockerfile for pnpm monorepo node_modules structure
- Fixed Next.js standalone path for monorepo (apps/web/server.js)
- Fixed Traefik Docker API version compatibility
- Network segmentation: web NOT on data-net, api NOT on frontend-net

apps/web/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "@tessera/web",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "dev": "next dev --turbopack",
+    "build": "next build",
+    "start": "next start",
+    "type-check": "tsc --noEmit"
+  },
+  "dependencies": {
+    "next": "^15.3.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "tailwindcss": "^4.0.0",
+    "@tailwindcss/postcss": "^4.0.0",
+    "postcss": "^8.0.0",
+    "typescript": "^5.5.0",
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0"
+  }
+}