Add metadata

Author: jianingwang123

README.md

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+---
+page_type: sample
+languages:
+- azdeveloper
+- python
+- bicep
+- html
+products:
+- azure
+- azure-app-service
+- azure-postgresql
+- azure-virtual-networks
+urlFragment: msdocs-flask-postgresql-sample-app
+name: Deploy a Python (Flask) web app with PostgreSQL in Azure
+description: This is a Python web app using the Flask framework and the Azure Database for PostgreSQL relational database service. 
+---
+<!-- YAML front-matter schema: https://review.learn.microsoft.com/en-us/help/contribute/samples/process/onboarding?branch=main#supported-metadata-fields-for-readmemd -->
+
 # Deploy a Python (Flask) web app with PostgreSQL in Azure
 
 This is a Python web app using the Flask framework and the Azure Database for PostgreSQL relational database service. The Flask app is hosted in a fully managed Azure App Service. This app is designed to be be run locally and then deployed to Azure. You can either deploy this project by following the tutorial [*Deploy a Python (Django or Flask) web app with PostgreSQL in Azure*](https://docs.microsoft.com/azure/app-service/tutorial-python-postgresql-app) or by using the [Azure Developer CLI (azd)](https://learn.microsoft.com/azure/developer/azure-developer-cli/overview) according to the instructions below.