adding uns x postgresql notebook (#720)

Co-authored-by: ajay23-uns <[email protected]>
Co-authored-by: Paul-Cornell <[email protected]>

Author: 3 people

examplecode/notebooks.mdx

@@ -6,6 +6,13 @@ description: "Notebooks contain complete working sample code for end-to-end solu
 ---
 
 <CardGroup cols={2}>
+    <Card title="Getting Started with Unstructured API and PostgreSQL" href="https://colab.research.google.com/github/Unstructured-IO/notebooks/blob/main/notebooks/Getting_Started_with_Unstructured_API_and_PostgreSQL.ipynb">
+    <br/>
+       Learn how to build data processing workflows using the Unstructured API and Python SDK to preprocess unstructured files from S3 and store the structured outputs in PostgreSQL for retrieval.
+    <br/>
+       ``Unstructured API`` ``Workflows`` ``S3`` ``PostgreSQL`` 
+    <br/>
+    </Card>
     <Card title="Unstructured Partition Endpoint Quickstart" href="https://colab.research.google.com/github/Unstructured-IO/notebooks/blob/main/notebooks/Unstructured_Partition_Endpoint_Quickstart.ipynb">
     <br/>
        This notebook calls the Unstructured Python SDK to have Unstructured process a local file by using the Unstructured Partition Endpoint.