recurse-database-server.js

var app = require('express')();

var env = {};

app.get('/set', function (req, res) {
  var query = req.query, key = Object.keys(query)[0];
  env[key] = query[key];
  res.sendStatus(200);
});

app.get('/get', function (req, res) {
  var key = req.query.key;
  res.status(200).send(env[key]);
});

app.listen(4000, function () {
  console.log('listening on 4000');
});