feat: healthz endpoint

server/controllers/common.js

@@ -18,6 +18,17 @@ router.get('/robots.txt', (req, res, next) => {
 })
 
 /**
+ * Health Endpoint
+ */
+router.get('/healthz', (req, res, next) => {
+  if (WIKI.models.knex.client.pool.numFree() < 1 && WIKI.models.knex.client.pool.numUsed() < 1) {
+    res.status(503).json({ ok: false }).end()
+  } else {
+    res.status(200).json({ ok: true }).end()
+  }
+})
+
+/**
  * Create/Edit document
  */
 router.get(['/e', '/e/*'], async (req, res, next) => {