docs: update version and README

api/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "api",
-  "version": "2.1.0",
+  "version": "2.2.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

api/package.json

@@ -1,6 +1,6 @@
 {
   "name": "api",
-  "version": "2.1.0",
+  "version": "2.2.0",
   "description": "Backend REST API for FunctionProject",
   "scripts": {
     "start": "node app.js",