[backend][nodejs] Add decision maker with hardcoded decisions A,B,C

backend/nodejs/random-decision.js

@@ -0,0 +1,23 @@
+const random = require('random');
+
+class Choice {
+    constructor(name) {
+        this.name = name;
+    }
+
+    toString() {
+        return this.name;
+    }
+}
+
+const choices = [
+    new Choice('A'),
+    new Choice('B'),
+    new Choice('C')
+];
+
+exports.getRandomChoice = () => {
+    return choices[random.int(0, choices.length - 1)];
+}
+
+exports.choices = choices;