Add v4, with proxy, app and db

bulletin-board-app/backend/api.js

@@ -0,0 +1,43 @@
+var db = require('./db.js');
+
+exports.events = function (req, res) {
+  console.log('Loading DB events...');
+  db.Events
+    .findAll()
+    .then(events => {
+        console.log('Fetched events, count: ' + events.length);
+        res.json(events);
+    })
+    .catch(err => {
+        console.error('** Fetch failed: ', err);
+    });
+};
+
+exports.event = function (req, res) {
+  console.log('Handling event call, method: ' + req.method + ', event ID: ' + req.params.eventId)
+  switch(req.method) {
+    case "DELETE":
+      db.Events
+      .destroy({
+        where: {
+          id: req.params.eventId
+        }
+      }).then(function() {
+        console.log('Deleted event with id: ' + req.params.eventId)
+        res.status(200).end();
+      });
+      break
+    case "POST":
+      db.Events
+        .create({
+          title: req.body.title,
+          detail: req.body.detail,
+          date: req.body.date
+        })
+        .then(function() {
+          res.send('{}');
+          res.status(201).end();
+        });
+      break
+  }
+};