Create README.md

Example of unit testing for one or more SQL Server objects using tSQLt, Docker, and GitHub Actions

samples/containers/unit-testing/tsqlt-docker/README.md

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+<!-- Always leave the MS logo -->
+![](./media/solutions-microsoft-logo-small.png)
+
+# Sample name
+
+Briefly describe what the sample does. Describe the benefit of running this sample.
+
+<!-- Add a diagram if you have it -->
+
+![Alt text](/media/image-name.png "<Friendly name>")
+
+
+### Contents
+
+[About this sample](#about-this-sample)<br/>
+[Before you begin](#before-you-begin)<br/>
+[Run this sample](#run-this-sample)<br/>
+[Sample details](#sample-details)<br/>
+[Disclaimers](#disclaimers)<br/>
+[Related links](#related-links)<br/>
+
+
+<a name=about-this-sample></a>
+
+## About this sample
+
+<!-- Delete the ones that don't apply -->
+- **Applies to:** SQL Server 2016 (or higher), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse
+- **Key features:**
+- **Workload:**
+- **Programming Language:**
+- **Authors:**
+- **Update history:**
+
+<a name=before-you-begin></a>
+
+## Before you begin
+
+To run this sample, you need the following prerequisites.
+
+**Software prerequisites:**
+
+<!-- Examples -->
+1. SQL Server 2016 (or higher) or an Azure SQL Database
+2. Visual Studio 2015 (or higher) with the latest SSDT installed
+
+**Azure prerequisites:**
+
+<!-- Examples -->
+1. Permission to create an Azure SQL Database
+
+<a name=run-this-sample></a>
+
+## Run this sample
+
+<!-- Step by step instructions. Here's a few examples -->
+
+1. From Visual Studio, open the **sample.sln** file from the root directory.
+
+2. In Visual Studio Build menu, select **Build Solution** (or Press F6).
+
+3. Step 3 ... 
+
+<a name=sample-details></a>
+
+## Sample details
+
+Describe sample details
+
+<a name=disclaimers></a>
+
+## Disclaimers
+The code included in this sample is not intended to be ...
+
+<a name=related-links></a>
+
+## Related Links
+<!-- Links to more articles. Remember to delete "en-us" from the link path. -->
+
+For more information, see these articles: