[dev docs] Add sample data tutorial. Closes #98297 (#99252)

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

dev_docs/tutorials/sample_data.mdx

@@ -0,0 +1,33 @@
+---
+id: kibDevTutorialSampleData
+slug: /kibana-dev-docs/tutorial/sample-data
+title: Add sample data
+summary: Learn how to add sample data to Kibana
+date: 2021-04-26
+tags: ['kibana', 'onboarding', 'dev', 'architecture', 'tutorials']
+---
+
+## Installation from the UI
+
+1. Navigate to the home page.
+2. Click **Add data**.
+3. Click on the **Sample data** tab.
+4. Select a dataset by clicking on the **Add data** button.
+
+![Sample Data](../assets/sample_data.png)
+
+## CSV Upload
+
+1. Navigate to the **Machine Learning** application.
+2. Click on the **Data Visualizer** tab.
+3. Click on **Select file** in the **Import data** container.
+
+![CSV Upload](../assets/ml_csv_upload.png)
+
+## makelogs
+
+The makelogs script generates sample web server logs.  Make sure Elasticsearch is running before running the script.
+
+```sh
+node scripts/makelogs --auth <username>:<password>
+```