feat: Phase 1 — Projektstruktur, DB-Schema, Auth-System

- Vollständige Verzeichnisstruktur gemäß CLAUDE.md
- Express-Server mit Helmet, Sessions, Rate Limiting, SPA-Fallback
- SQLite-Schema (Migration v1): 10 Tabellen, updated_at-Triggers, Indizes
- Versioniertes Migrations-System (schema_migrations)
- Auth-Routen: Login, Logout, /me, Admin-User-CRUD
- Frontend App-Shell: SPA-Router, API-Client, Design-System (CSS Tokens)
- PWA: Service Worker, Web App Manifest
- Setup-Script für ersten Admin-User (node setup.js)
- DB-Tests mit node:sqlite built-in: 29/29 bestanden
- Docker Compose + Dockerfile + Nginx-Beispielkonfiguration

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

docker-compose.yml

@@ -0,0 +1,26 @@
+version: "3.9"
+
+services:
+  oikos:
+    build: .
+    container_name: oikos
+    restart: unless-stopped
+    ports:
+      - "3000:3000"
+    volumes:
+      - oikos_data:/data
+    env_file:
+      - .env
+    environment:
+      - NODE_ENV=production
+      - DB_PATH=/data/oikos.db
+    healthcheck:
+      test: ["CMD", "node", "-e", "require('http').get('http://localhost:3000/health', r => process.exit(r.statusCode === 200 ? 0 : 1))"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s
+
+volumes:
+  oikos_data:
+    driver: local