Moved the NodeJS version of the application to the app/ directory.

app/backend/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "azure-image-chooser-backend",
+  "version": "0.1.0",
+  "private": true,
+  "type": "commonjs",
+  "scripts": {
+    "build": "tsc -p tsconfig.json",
+    "dev": "tsx watch src/server.ts",
+    "start": "node ../dist/backend/server.js",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@azure/arm-compute": "^23.3.0",
+    "@azure/identity": "^4.13.1",
+    "cors": "^2.8.5",
+    "dotenv": "^17.2.3",
+    "express": "^5.2.1",
+    "nunjucks": "^3.2.4",
+    "zod": "^4.3.6"
+  },
+  "devDependencies": {
+    "@types/cors": "^2.8.19",
+    "@types/express": "^5.0.3",
+    "@types/nunjucks": "^3.2.6",
+    "@types/node": "^24.9.1",
+    "typescript": "^6.0.3",
+    "tsx": "^4.20.6",
+    "vitest": "^3.2.4"
+  }
+}