Initiële commit: VibeFinance 3-container opzet

Basislijn van de bestaande applicatie (Vite/React frontend, Express
backend, PostgreSQL) zoals die in de index stond, plus dev-, release-
en documentatiescripts.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

backend/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "vibefinance-backend",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "start": "node src/server.js",
+    "dev":   "node --watch src/server.js",
+    "lint":  "eslint src --ext .js"
+  },
+  "dependencies": {
+    "bcryptjs":           "^2.4.3",
+    "cookie-parser":      "^1.4.6",
+    "cors":               "^2.8.5",
+    "dotenv":             "^16.4.5",
+    "express":            "^4.19.2",
+    "express-rate-limit": "^7.4.0",
+    "helmet":             "^7.1.0",
+    "jsonwebtoken":       "^9.0.2",
+    "pg":                 "^8.13.3",
+    "pino":               "^9.0.0",
+    "pino-http":          "^10.0.0",
+    "pino-pretty":        "^13.0.0"
+  },
+  "devDependencies": {
+    "eslint": "^8.57.0"
+  }
+}