build: setup docker containers for development

app/server/middlewares/authentication.js

@@ -0,0 +1,21 @@
+import crypto from 'node:crypto';
+
+const authenticateToken = function(req, res, next) {
+  const token = req.cookies.auth_token;
+
+  if(!token) {
+    res.redirect("/");
+  }
+
+  const data = token.split('.');
+
+  const hash = crypto.createHmac('sha256', process.env.AUTH_JWT_SECRET).update(data[0] + '.' + data[1]).digest('base64url');
+
+  if (hash === data[2]) {
+    next();
+  } else {
+    res.redirect('/users/login');
+  }
+};
+
+export default authenticateToken;

app/server/middlewares/limitedUsers.js

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+import dbClient from '../db/index.js';
+
+async function limitedUsers(_, res, next) {
+  const countQuery = await dbClient.query('SELECT COUNT(*) FROM users');
+  if(countQuery.rows[0].count > 0) {
+    res.redirect('/users/login');
+  }
+
+  next();
+}
+
+export default limitedUsers;