Added/updated snippets for docs (#2318)

docs/doc_examples/b2e1e802fc3c5fbeb4190af7d598c23e.asciidoc

@@ -0,0 +1,17 @@
+// This file is autogenerated, DO NOT EDIT
+// Use `node scripts/generate-docs-examples.js` to generate the docs examples
+
+[source, js]
+----
+const response = await client.index({
+  index: "my-index-000001",
+  document: {
+    "@timestamp": "2099-11-15T13:12:00",
+    message: "GET /search HTTP/1.1 200 1070000",
+    user: {
+      id: "kimchy",
+    },
+  },
+});
+console.log(response);
+----