Add Health Check Endpoint

Dockerfile

@@ -39,7 +39,7 @@ USER bun
 ENV PORT=3000
 
 HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
-  CMD bun -e "fetch(\`http://localhost:\${process.env.PORT}\`).then(r=>{if(!r.ok)throw 1}).catch(()=>process.exit(1))"
+  CMD bun -e "fetch(\`http://localhost:\${process.env.PORT}/health\`).then(r=>{if(!r.ok)throw 1}).catch(()=>process.exit(1))"
 
 EXPOSE 3000
 CMD ["bun", "run", "start"]

server.ts

@@ -1,5 +1,6 @@
 import { Glob } from 'bun';
 import { join } from 'node:path';
+import { healthResponse } from './src/server/health';
 import {
   metricsResponse,
   httpRequestsTotal,
@@ -79,6 +80,7 @@ const server = Bun.serve({
   routes: {
     ...(await buildStaticRoutes()),
     '/metrics': (req) => metricsResponse(req),
+    '/health': () => healthResponse(),
     '/*': async (req) => {
       const url = new URL(req.url);
       const res = await withHttpMetrics(req, url.pathname, () => handler.fetch(req));

src/server/health.test.ts

@@ -0,0 +1,13 @@
+import { describe, expect, it } from 'vitest';
+import { healthResponse } from './health';
+
+describe('healthResponse', () => {
+  it('returns 200', () => {
+    expect(healthResponse().status).toBe(200);
+  });
+
+  it('returns ok status in body', async () => {
+    const body = await healthResponse().json();
+    expect(body).toEqual({ status: 'ok' });
+  });
+});

src/server/health.ts

@@ -0,0 +1,3 @@
+export function healthResponse(): Response {
+  return Response.json({ status: 'ok' });
+}