[DOCS] Port over "How to instantiate a DataContext on an EMR Spark Cl…

…uster" from RTD to Docusaurus (#3024)

docs/deployment_patterns/how-to-instantiate-a-data-context-on-an-emr-spark-cluster.md

@@ -1,5 +1,46 @@
 ---
 title: How to instantiate a Data Context on an EMR Spark cluster
 ---
+import Prerequisites from '../guides/connecting_to_your_data/components/prerequisites.jsx'
+
+This guide will help you instantiate a Data Context on an EMR Spark cluster.
+
+
+The guide demonstrates the recommended path for instantiating a Data Context without a full configuration directory and without using the Great Expectations [command line interface (CLI)](../guides/miscellaneous/how-to-use-the-great-expectations-cli.md).
+
+
+<Prerequisites>
+
+- [Followed the Getting Started tutorial and have a basic familiarity with the Great Expectations configuration](../tutorials/getting-started/intro.md).
+
+</Prerequisites>
+
+Steps
+-----
+
+1. **Install Great Expectations on your EMR Spark cluster.**
+
+   Copy this code snippet into a cell in your EMR Spark notebook and run it:
+
+    ```python
+  sc.install_pypi_package("great_expectations")
+    ```
+
+
+2. **Configure a Data Context in code.**
+
+    Follow the steps for creating an in-code Data Context in [How to instantiate a Data Context without a yml file](../guides/setup/configuring-data-contexts/how-to-instantiate-a-data-context-without-a-yml-file.md).
+
+    The snippet at the end of the guide shows Python code that instantiates and configures a Data Context in code for an EMR Spark cluster. Copy this snippet into a cell in your EMR Spark notebook or use the other examples to customize your configuration.
+
+
+3. **Test your configuration.**
+
+       Execute the cell with the snippet above.
+
+       Then copy this code snippet into a cell in your EMR Spark notebook, run it and verify that no error is displayed:
+
+      ```python
+      context.list_datasources()
+      ```
 
-This article is a stub.