add auth server with hardcoded pass!

auth/Dockerfile

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+FROM node:12
+WORKDIR /usr/src/app
+COPY package*.json ./
+RUN npm install
+COPY server.js ./
+CMD ["npm", "start"]

auth/package.json

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+{
+  "name": "auth",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "nodemon server.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.17.1",
+    "nodemon": "^2.0.7"
+  }
+}

auth/server.js

@@ -0,0 +1,22 @@
+const express = require('express');
+const app = express();
+
+app.use(express.urlencoded());
+
+app.post("/auth", function (req, res) {
+  /* This server is only available to nginx */
+  const streamkey = req.body.key;
+
+  /* You can make a database of users instead :) */
+  if (streamkey === "supersecret23") {
+    res.status(200).send();
+    return;
+  }
+
+  /* Reject the stream */
+  res.status(403).send();
+});
+
+app.listen(8000, function () {
+  console.log("Listening on port 8000!");
+});