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- Uploaded Backend
- Uploaded Mod Code
- Started Documentation

Backend/package.json

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+{
+  "name": "gp-server",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "module"
+}

Backend/server.js

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+import express from "express";
+import client from "prom-client";
+
+const registry = new client.Registry();
+
+const app = express();
+
+var active_users = 0;
+
+const users = new client.Gauge({
+  name: "active_users",
+  help: "active_users",
+  async collect() {
+    this.set(active_users);
+  },
+});
+
+registry.registerMetric(users);
+
+app.get("/", (req, res) => {
+  res.send("player-metrics");
+});
+
+app.post("/api/players", (req, res) => {
+  res.send("ok");
+  active_users++;
+});
+
+app.get("/metrics", async (req, res) => {
+  res.setHeader("Content-Type", client.contentType);
+  res.send(await registry.metrics());
+  res.end();
+
+  active_users = 0; // reset the active_users when prometheus gets metrics (aka reset every minute -- prometheus default poll time)
+});
+
+app.listen(5008, () => {
+  console.log("listening on :" + 5008);
+});

Backend/start.sh

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+node server.js