Update Railway config and health endpoint

railway.json

@@ -1,10 +1,12 @@
 {
-  "build": "npm install && npm run build",
+  "$schema": "https://railway.app/railway.schema.json",
-  "start": "npm start",
+  "build": {
-  "service": {
+    "builder": "NIXPACKS",
-    "port": 8080,
+    "buildCommand": "npm install && npm run build",
-    "healthcheck": {
+    "startCommand": "npm run start"
-      "path": "/api/health"
+  },
-    }
+  "deploy": {
+    "healthcheckPath": "/api/health",
+    "restartPolicyType": "ON_FAILURE"
   }
 }

src/pages/api/health.js

@@ -1,7 +1,6 @@
 export default function handler(req, res) {
   res.status(200).json({
-    ok: true,
+    status: 'ok',
     service: 'docs',
-    ts: new Date().toISOString(),
   });
 }