Migrate to version 2 of nodes.json and start adding tests

package.json

@@ -1,6 +1,6 @@
 {
     "name": "ffffng",
-    "version": "0.13.4",
+    "version": "0.13.5-SNAPSHOT",
     "description": "Node management form for Freifunk",
     "license": "MIT",
     "author": {
@@ -19,9 +19,12 @@
         "ffffng": "server/main.js"
     },
     "scripts": {
+        "test": "npm run server:test",
         "build": "npm run server:build && grunt build",
         "clean": "rm -rf server-build/ && grunt clean",
+        "dist": "npm run clean && npm run build && npm run test",
         "client:serve": "grunt serve",
+        "server:test": "jest --config=jest.server.config.js",
         "server:build": "tsc -b server && ln -sfv ../server/db/patches ./server-build/db/ && ln -sfv ../server/templates ./server-build/ && ln -sfv ../server/mailTemplates ./server-build/",
         "server:run": "npm run server:build && node server-build/main.js"
     },
@@ -61,6 +64,7 @@
         "@types/glob": "^7.1.1",
         "@types/graceful-fs": "^4.1.3",
         "@types/html-to-text": "^1.4.31",
+        "@types/jest": "^26.0.3",
         "@types/lodash": "^4.14.149",
         "@types/node": "^13.11.0",
         "@types/node-cron": "^2.0.3",
@@ -95,10 +99,12 @@
         "grunt-usemin": "^3.1.1",
         "grunt-wiredep": "^3.0.1",
         "imagemin-gifsicle": "^6.0.1",
+        "jest": "^26.1.0",
         "jshint-stylish": "^2.2.1",
         "load-grunt-tasks": "^5.1.0",
         "time-grunt": "^2.0.0",
-        "typescript": "^3.8.3"
+        "ts-jest": "^26.1.1",
+        "typescript": "^3.9.5"
     },
     "engines": {
         "node": ">=10.0.0"