feat: cache only if the response is succeeded

api/util/http.js

@@ -0,0 +1,8 @@
+exports.send = (res, availability) => {
+  res.setHeader('Cache-Control', 'maxage=0, s-maxage=3600')
+  res.json({ availability })
+}
+
+exports.sendError = (res, error) => {
+  res.status(400).json({ error: error.message })
+}