[docs] Migrate docs from AsciiDoc to Markdown (#2635)

* delete asciidoc files

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Co-authored-by: Josh Mock <josh@joshmock.com>

* Apply suggestions from review

Co-authored-by: Josh Mock <josh@joshmock.com>

* add the new ci checks (#2634)

---------

Co-authored-by: Marci W <333176+marciw@users.noreply.github.com>
Co-authored-by: Josh Mock <josh@joshmock.com>

docs/reference/getting-started.md

@@ -0,0 +1,154 @@
+---
+mapped_pages:
+  - https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/getting-started-js.html
+  - https://www.elastic.co/guide/en/serverless/current/elasticsearch-nodejs-client-getting-started.html
+---
+
+# Getting started [getting-started-js]
+
+This page guides you through the installation process of the Node.js client, shows you how to instantiate the client, and how to perform basic Elasticsearch operations with it.
+
+
+### Requirements [_requirements]
+
+* [Node.js](https://nodejs.org/) version 14.x or newer
+* [`npm`](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm), usually bundled with Node.js
+
+
+### Installation [_installation]
+
+To install the latest version of the client, run the following command:
+
+```shell
+npm install @elastic/elasticsearch
+```
+
+Refer to the [*Installation*](/reference/installation.md) page to learn more.
+
+
+### Connecting [_connecting]
+
+You can connect to the Elastic Cloud using an API key and the Elasticsearch endpoint.
+
+```js
+const { Client } = require('@elastic/elasticsearch')
+const client = new Client({
+  node: 'https://...', // Elasticsearch endpoint
+  auth: {
+    apiKey: { // API key ID and secret
+      id: 'foo',
+      api_key: 'bar',
+    }
+  }
+})
+```
+
+Your Elasticsearch endpoint can be found on the **My deployment** page of your deployment:
+
+:::{image} ../images/es-endpoint.jpg
+:alt: Finding Elasticsearch endpoint
+:::
+
+You can generate an API key on the **Management** page under Security.
+
+:::{image} ../images/create-api-key.png
+:alt: Create API key
+:::
+
+For other connection options, refer to the [*Connecting*](/reference/connecting.md) section.
+
+
+### Operations [_operations]
+
+Time to use Elasticsearch! This section walks you through the basic, and most important, operations of Elasticsearch.
+
+
+#### Creating an index [_creating_an_index]
+
+This is how you create the `my_index` index:
+
+```js
+await client.indices.create({ index: 'my_index' })
+```
+
+
+#### Indexing documents [_indexing_documents]
+
+This is a simple way of indexing a document:
+
+```js
+await client.index({
+  index: 'my_index',
+  id: 'my_document_id',
+  document: {
+    foo: 'foo',
+    bar: 'bar',
+  },
+})
+```
+
+
+#### Getting documents [_getting_documents]
+
+You can get documents by using the following code:
+
+```js
+await client.get({
+  index: 'my_index',
+  id: 'my_document_id',
+})
+```
+
+
+#### Searching documents [_searching_documents]
+
+This is how you can create a single match query with the client:
+
+```js
+await client.search({
+  query: {
+    match: {
+      foo: 'foo'
+    }
+  }
+})
+```
+
+
+#### Updating documents [_updating_documents]
+
+This is how you can update a document, for example to add a new field:
+
+```js
+await client.update({
+  index: 'my_index',
+  id: 'my_document_id',
+  doc: {
+    foo: 'bar',
+    new_field: 'new value'
+  }
+})
+```
+
+
+#### Deleting documents [_deleting_documents]
+
+```js
+await client.delete({
+  index: 'my_index',
+  id: 'my_document_id',
+})
+```
+
+
+#### Deleting an index [_deleting_an_index]
+
+```js
+await client.indices.delete({ index: 'my_index' })
+```
+
+
+## Further reading [_further_reading]
+
+* Use [*Client helpers*](/reference/client-helpers.md) for a more comfortable experience with the APIs.
+* For an elaborate example of how to ingest data into Elastic Cloud, refer to [this page](docs-content://manage-data/ingest/ingesting-data-from-applications/ingest-data-with-nodejs-on-elasticsearch-service.md).