VIA-4 AJ/MD/DB Setup package json, node version manager and yarn

Author: donna-belsey-nhs

.nvmrc

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+v22.13.1

package.json

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+{
+  "name": "vaccinations-app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "directories": {
+    "doc": "docs",
+    "test": "tests"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/NHSDigital/vaccinations-app.git"
+  },
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/NHSDigital/vaccinations-app/issues"
+  },
+  "homepage": "https://github.com/NHSDigital/vaccinations-app#readme",
+  "volta": {
+    "node": "22.13.1",
+    "yarn": "4.6.0"
+  }
+}

yarn.lock

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+# This file is generated by running "yarn install" inside your project.
+# Manual changes might be lost - proceed with caution!
+
+__metadata:
+  version: 8
+  cacheKey: 10c0
+
+"vaccinations-app@workspace:.":
+  version: 0.0.0-use.local
+  resolution: "vaccinations-app@workspace:."
+  languageName: unknown
+  linkType: soft