add healthcheck endpoint

README.md

@@ -90,6 +90,10 @@ POST - `/schema/validate` Validate schema between provided and latest schemas.
 </p>
 </details>
 
+### Monitoring
+
+GET - `/health` healthcheck endpoint.
+
 ### Persisted Queries
 
 GET - `/persisted_query?key=foo` Looks up persisted query from KV Storage.

src/index.ts

@@ -9,9 +9,12 @@ import { getSchemaDiff } from './routes/get-schema-diff'
 import { getSchemaValidation } from './routes/get-schema-validation'
 import { registerSchema } from './routes/register-schema'
 import { deletePersistedQuery } from './routes/delete-persisted-query'
+import { healthcheck } from './routes/healthcheck'
 
 const API = new Router()
 
+API.add('GET', '/health', healthcheck)
+
 // Federation
 API.add('POST', '/schema/push', compose(basicAuth, registerSchema))
 API.add('GET', '/schema/latest', compose(basicAuth, getComposedSchema))

src/routes/healthcheck.ts

@@ -0,0 +1,11 @@
+import type { Handler } from 'worktop'
+
+/**
+ * Healthcheck endpoint. Useful for monitoring.
+ *
+ * @param req
+ * @param res
+ */
+export const healthcheck: Handler = async function (req, res) {
+  res.send(200)
+}