sample custom log infos

custom-log-infos/index.js

@@ -0,0 +1,27 @@
+const Fastify = require('fastify');
+
+(async () => {
+  const app = Fastify({
+    logger: {
+      level: 'info',
+      serializers: {
+        req: (request) => ({
+          method: request.raw.method,
+          url: request.raw.url,
+          hostname: request.hostname,
+        }),
+        res: (response) => ({
+          statusCode: response.statusCode,
+        }),
+      },
+    },
+  });
+
+  app.get('/', async (req, res) => {
+    return { hello: 'world' };
+  });
+
+  await app.listen({ port: 3000 });
+})();
+
+// curl -H 'x-log-level: error' http://localhost:3000