v3: port static pages, make routes lib more flexible, share middlewares between v2 and v3, port v1, simplify server.js

website/src/controllers/api-v3/status.js

@@ -0,0 +1,21 @@
+let api = {};
+
+/**
+ * @api {get} /status Get Habitica's status
+ * @apiVersion 3.0.0
+ * @apiName GetStatus
+ * @apiGroup Status
+ *
+ * @apiSuccess {status} string 'up' if everything is ok
+ */
+api.getStatus = {
+  method: 'GET',
+  url: '/status',
+  async handler (req, res) {
+    res.respond(200, {
+      status: 'up',
+    });
+  },
+};
+
+module.exports = api;